Just tested on my Mac with 10 build 1188 opening a 7 project that was saved years ago from Windows in 7 build 1877, and did not get any messages other than library things to resolve.
No idea why it's not working for you though. Sorry.
One of the forum moderators
AC 26 USA and earlier • macOS Ventura 13.4, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB