Looks as if your AC library is not in the same folder(path) on both machines so AC does not know where to find it. Launch the Library manager under file and reload the main library.
Please include AC version and OS as part of the signature...
Eduardo Rolón AIA NCARB
AC27 US/INT -> AC08Macbook Pro M1 Max 64GB ram, OS X 10.XX latest
another Moderator