There is no 'Porting Library' needed. The same Library (mostly) works with any OS or Calibre version (There are Windows vs Others, filename case issues that can crop up
The problem is most likely in WHERE (or the rights it inherited) you put the Library when you copied it to your system
The Library can not be in the Programs area. If it is, move THAT folder into your User folder. Then start Calibre and point it to the New Location (or use Switch/Create: Use Existing)
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