Very long name files/path makes YACReader Library not load the file.
A path + filename of more than 276 characters makes YACReader Library not load the file.
This creates another problem, the cover for those files are not generated or generated incorrectly:
-I trimmed those file names and then the files loaded correctly.
-But cover remained broken, "Scan Library" and "Update Library" options did not solved the issue.
Deleting the library and creating a new one with names trimmed worked as workaround.