No, it does not. I have tried Classic Look, Stripe Look, Overlapped Striped Look, Modern Look, and the Roulette Look. None of them change the view. Everything is still the black cover with white, thin outlines (you can see that there are stacks), and the title below it.

***UPDATE*** Out of nowhere, the cover art started to appear. I then noticed that there was a YACReader update available for the Windows desktop application (v. 9.14.0.2311291). Once I installed that update, rebooted the computer, and restarted the YACReader Library application, the cover art once again disappeared.

The latest dev version has a fix for this problem. Try to uninstall YACReader, make sure the installation folder is gone after that, delete it if you need to. And then install: github.com/YACReader/yacreader-dev-build...s/tag/9.14.0.2311291

The problem was malformed URLs for the files when the path contains some special characters. If you still have the problem after reinstalling please, share with me the full path to your library.

Unfortunately, that did not work for me.

As instructed
1. I fully uninstalled the program and deleted any residual folders, including the ".yacreaderlibrary" folder that is created in association with library creation.
2. I ran a cleaning program and then rebooted the computer.
3. I installed the software downloaded from the link that you provided.
4. I opened the program and aside from the yellow icon that indicates new issues, the result is the same, no cover art.

My folder paths are:
D:\Collection
D:\Collection\.yacreaderlibrary

What's inside D:\Collection\.yacreaderlibrary\covers?

Anyway,

close YACReaderLibrary, go to C:\Users\your_user_name\AppData\Local\YACReader\YACReaderLibrary and delete yacreaderlibrary.log

Then run YACReaderLibrary from the console: YACReaderLibrary --loglevel trace

Once you see there are no covers where they should be, close the app, and send me yacreaderlibrary.log

INFO 2023-12-14T12:26:52.523 YACReaderLibrary attempting to start
INFO 2023-12-14T12:26:52.525

---

System & configuration

---

INFO 2023-12-14T12:26:52.525 OS: "Windows 11 Version 2009" Version: "11"
INFO 2023-12-14T12:26:52.525 Kernel: "winnt" "10.0.22000" Architecture: "x86_64"
INFO 2023-12-14T12:26:52.525 7z : found
INFO 2023-12-14T12:26:52.525 qrencode : not found
INFO 2023-12-14T12:26:52.526 server : enabled
INFO 2023-12-14T12:26:52.526 OpenGL : enabled - VSync off
INFO 2023-12-14T12:26:52.940 OpenGL version : "4.5 desktop"
WARN 2023-12-14T12:26:52.963 QString::arg: Argument missing: 9f674a45-64c7-4c47-9066-7da80d9e6a47, D:/Collection
INFO 2023-12-14T12:26:52.963 Libraries: QList("The Hall Of Justice [1, 9f674a45-64c7-4c47-9066-7da80d9e6a47, %4]")
INFO 2023-12-14T12:26:52.963

---

INFO 2023-12-14T12:26:52.964 YACReaderLibrary starting
DEBUG 2023-12-14T12:26:52.964 TemplateLoader: path=C:/Program Files/YACReader/server/templates, codec=
DEBUG 2023-12-14T12:26:52.964 TemplateCache: timeout=60000, size=160000
DEBUG 2023-12-14T12:26:52.965 HttpSessionStore: Sessions expire after 864000000 milliseconds
DEBUG 2023-12-14T12:26:52.965 StaticFileController: docroot=C:/Program Files/YACReader/server/docroot, encoding=UTF-8, maxAge=60000
DEBUG 2023-12-14T12:26:52.965 StaticFileController: cache timeout=60000, size=1000000
DEBUG 2023-12-14T12:26:52.965 ServiceHelper: Starting service
DEBUG 2023-12-14T12:26:52.985 HttpListener: Listening on port 8080
DEBUG 2023-12-14T12:26:52.985 ServiceHelper: Service has started
WARN 2023-12-14T12:26:53.163 QLayout::addChildLayout: layout "" already has a parent
WARN 2023-12-14T12:26:53.431 QQuickWidget is only supported on OpenGL. Use QQuickWindow::setGraphicsApi() to override the default.
TRACE 2023-12-14T12:26:53.744 InfoComicsView
DEBUG 2023-12-14T12:26:55.375 origin changed -20
DEBUG 2023-12-14T12:26:55.376 content y changed -20
DEBUG 2023-12-14T12:26:55.377 origin changed -20
DEBUG 2023-12-14T12:26:55.377 content y changed -20
DEBUG 2023-12-14T12:26:55.404 origin changed -20
DEBUG 2023-12-14T12:26:55.404 content y changed -20
DEBUG 2023-12-14T12:26:55.416 origin changed -20
DEBUG 2023-12-14T12:26:55.416 content y changed -20
DEBUG 2023-12-14T12:26:55.446 origin changed -20
DEBUG 2023-12-14T12:26:55.446 content y changed -20
WARN 2023-12-14T12:26:57.262 QSqlDatabasePrivate::addDatabase: duplicate connection name 'D:/Collection/.yacreaderlibrary34f8', old connection removed.
WARN 2023-12-14T12:26:57.972 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/f53cd19b1b116b29def5d0379029b5c0f04e46e724478492.jpg
WARN 2023-12-14T12:26:57.972 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/127f03f8ed0448df4a9e09c3347a4499005f6dfb70366601.jpg
WARN 2023-12-14T12:26:57.972 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/32bf38994ac99db41165d3b3cbdeebbcfe16da0c109618715.jpg
WARN 2023-12-14T12:26:57.972 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/bf1c938b445d413604d96ee11db95b5b5ffa4ae748233756.jpg
WARN 2023-12-14T12:26:57.972 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/10dff1b5df33409a7af6883b9b12bef7eb170b6d31118579.jpg
WARN 2023-12-14T12:26:57.972 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/571b885ac4d82b4d25e8cc47a2c53261b0fd0f4814219958.jpg
WARN 2023-12-14T12:26:57.972 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/3e7566e2d56f4594cee1b16c7f950db5120596ea39366479.jpg
WARN 2023-12-14T12:26:57.972 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/96d67d785a503ab075c53485103a79d7b64684da6958276.jpg
WARN 2023-12-14T12:26:57.972 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/129dfc7999619a7c16f11e088bd086d59ef6f9c037186668.jpg
WARN 2023-12-14T12:26:58.166 Could not create pixmap from :\images\folders_view\line-up.png
WARN 2023-12-14T12:26:58.166 Could not create pixmap from :\images\folders_view\line-down.png
WARN 2023-12-14T12:26:58.204 Could not create pixmap from :\images\folders_view\line-up.png
WARN 2023-12-14T12:26:58.204 Could not create pixmap from :\images\folders_view\line-down.png
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/8ac3cc12401c1062fc21bda9777c37a9e14f0a6e35667171.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/2808d3796a4570727e61a1be7521f7fe5283104314200381.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/f93b6552a4496d4e7541657962f8a13e340a3cfb39383584.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/9a2633ecf6550d17da072a98fae77af03f0c435c31768435.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/dc1ed2cf49366d1b30ed67625501a511c16a410389666869.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/378a25922c85edcc8939da46cb7808c08ec0c4f838453937.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/8b33f2bf1a43613478988d4a3ec460a2c42b5ad842578737.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/0e40c6d31267a04a5b1fb62e816d7a7a63976dcd16835640.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/85696de66b5282189f7346710b17a7b1b01997fc6670564.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/6e7810069bc2e0366df91750ffba5a3b9bf2f00c17005373.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/b7a18e39325f05069be05988f0ab2322b1720a6214593811.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/4c4a6a6fe3e7946f02376f5e5614bc05158598ef48478068.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/da43eaf34ebec531a847e6ade09f90708616b3dc26810575.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/480447b1ac3809f44a3e4e1771b475665e51454813954813.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/083cb21da4abc61d75e4c269f2d0eb0cd6d9e5d814670294.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/cbb24b7ab8f7435bae0cb8741a0729dad4f7f19540713702.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/94df8994eb8ca46c5a44b7bf2c70ef3d21dcc77a373156940.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/d93e1ab4fbc2c0871f46b5ed17fb17f63a1435fa47498014.jpg
WARN 2023-12-14T12:26:58.373 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/2c2fe760e95bf2c061f09d4646b95933ecb2f3867757818.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/c68ac2c940a30408074bcfa571d6d0ed02e4dd5718757827.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/9a9d0311f0c7819c579dfc6e3842723dc2f35cd411857056.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/fe42c59fa4c1987291fd84cb5a92786035e835f21043304.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/8729d365325f77fec87cc7069f4ed25e3882d64144709623.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/9a02ed83eec4cdb98bf6ca3fc142c643f72e4c2c6780394.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/a012761d0f1375d7a99149ed715e4434cf096ba41445249.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/65bd8f4148a0f64bd6379296c5ef3115245cff4316003776.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/af438bdf53541fa8d497653790c6e5ef78be81cf68418732.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/72f0241d2604def9449375d6b78c26aa7aae9dd287581453.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/22f76d5483ea26666dc5061b1303f1c387bb30bc119289633.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/f75d5cb1b825a18c704712a8427e09b54a485f3610018978.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/7f32e2f4642682a6d029ea4347841878e0f73ec873206846.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/e971ce5ca443ec4d654d11d93fbda23406b2467917763945.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/0461d4c267c1427b125e10d65dfd59ab0219793134579466.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/c4bef7ef0fdc2900d554c16fd7bc5fd11f1827df14094733.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/3285e8b2fbb00ab67c3642523687fd0d3f5dc52911872680.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/449e79b1e0856e7c1f3a10c49a6af9bb94c1f2d312678042.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/1a07d1a6cbc30948f0a1d4c172d882859bcb6b767563701.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/4701ef2b5010c5f44e319c5648f3ac210519840b6865708.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/88976c05523b0870875bf33ba35e31f9580034ab50693436.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/2654fcf2a5a1fafcc5c09515d0124397fe08917f17556331.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/267c383ab8951bcd4275d35e4b4c5bb6b0bb4c5126641835.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/b76cfcec76ea48b58eedad8a72f05ce12b836d6d38216224.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/cb0626a3e7563694ce6708df404f81981a9e28e911644584.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/b820d45558cb17799fa0f024dacb2ae0886512ab7338524.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/99cac375dc3ba2b3a00b04531fc2da37c32c904291682715.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/c69ec0d1ff016c4287002110ff3cc40472162ad082636329.jpg
WARN 2023-12-14T12:26:58.374 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/e04522af48c2496a31e0bb10863b96c319373c5838336424.jpg
WARN 2023-12-14T12:26:58.375 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/0f114501794b34b2dcecd98272a67c2d90ec9fdc28612400.jpg
WARN 2023-12-14T12:26:58.375 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/b86699baafde1ef5555c70fda7a585a8ccf5794e90152834.jpg
WARN 2023-12-14T12:26:58.375 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/e330ac6d29879dfb646cb7caa049c35d922007ba10831069.jpg
WARN 2023-12-14T12:26:58.375 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/b82b2a9184ce628c64d5827178c2312149ed774f65146521.jpg
WARN 2023-12-14T12:26:58.375 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/5b4404174bb44ecfb3f8348a73b00c416aa710a37822120.jpg
WARN 2023-12-14T12:26:58.375 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/d2867e3a41f645e9ad4276f56af7569a50166a1617430508.jpg
WARN 2023-12-14T12:26:58.375 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/ad3ac0578f839096e13154af0a82e18c5cec974711188126.jpg
WARN 2023-12-14T12:26:58.375 qrc:/qml/FolderContentView.qml:113:17: QML QQuickImage: Cannot open: file:///D:/Collection/.yacreaderlibrary/covers/e829a5e48d7d5819c43d4707ec4063df42aedc4240096306.jpg

Size: 8.02 GB
Contains: 99,265 files

The expected cover art is shown in thumbnails in the folder.

What file system do you use in D?
What version of YACReader are you installing?

YACReader-v9.14.0.2311291-winx64-7z-qt6.exe
YACReader-v9.14.0.2311291-winx64-7z.exe
YACReader-v9.14.0.2311291-winx86-7z.exe

What's the structure of your library?, in folders, subfolders, etc.

If you can, pack the whole .yacreaderlibrary folder in a zip and share it with me, if it is too big, you can create a small test library with a few subfolders.