Thank you selmf, installing libsqlite3-dev solved the problem.
As I'm on Raspbian I couldn't install unarr, so I downloaded and extracted
github.com/zeniko/unarr/archive/master.zip in yacreader/compressed_archive/unarr/
This caused an error because with
this commit lzmasdk/Types.h was changed in lzmasdk/7zTypes.h
I solved creating a copy of the file and the build succeeded.
I managed to install YACReaderLibraryServer and it starts without problems. I managed to create a library and to add comics. I thought it all worked fine because it also created the cover file in .yacreaderlibrary/covers. The problem is that when I try to access from my iPhone I see the library, the folder and even the comic with its cover and information without problem, but if I try to import or read it I get an error.
Here the last lines of the log file:
2016-05-13 17:14:08.546 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.553 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.565 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.571 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.578 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.584 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.591 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.591 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.592 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.592 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.593 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.593 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.594 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.594 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.594 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.595 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.595 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.596 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.596 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.597 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.597 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.598 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.598 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.598 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.599 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.599 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.600 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.600 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.601 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.601 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.601 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.602 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.602 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.603 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.603 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.604 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.604 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.604 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.605 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.605 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.606 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.606 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.607 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.607 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.607 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.608 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name '/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.608 WARNING QSqlQuery::prepare: database not open
2016-05-13 17:14:08.609 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:08.615 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:12.618 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:12.624 WARNING Template: missing variable {folder.name} in folder_iphone
2016-05-13 17:14:12.625 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:12.631 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:12.638 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:12.649 WARNING Template: missing variable {page} in folder_iphone
2016-05-13 17:14:12.650 WARNING Template: missing variable {pages} in folder_iphone
2016-05-13 17:14:14.566 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:14.570 WARNING Template: missing variable {folder.name} in folder_iphone
2016-05-13 17:14:14.571 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:14.575 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:14.583 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
2016-05-13 17:14:14.588 WARNING Template: missing variable {page} in folder_iphone
2016-05-13 17:14:14.588 WARNING Template: missing variable {pages} in folder_iphone
2016-05-13 17:14:17.183 WARNING QSqlDatabasePrivate::addDatabase: duplicate connection name 'Comics/.yacreaderlibrary', old connection removed.
And here are the screenshots from the iPhone app:
EDIT:
I tried to add other comics and there is the same problem, the strange thing is that the iPhone app can detect the comics that I already imported (using YACReaderLibrary on my Mac) displaying "IMPORTED":