I currently crash consistently when attempting to level up Aloth to level 6 on Windows. This issue happens immediately when selecting the level up portrait button and is 100% reproducible.
I have now gotten the same issue attempting to level up Aloth to level 7.
The only workaround I have found is transferring my saves onto OSX, leveling up Aloth, and then transferring my saves back to Windows.
Attaching files here didn't work for me, so here's some Dropbox links:
Crash logs: https://www.dropbox.com/s/h93mgv6ngxt49ue/crash%20logs.zip?dl=0
Save Game: https://www.dropbox.com/s/cfnwzvias4s4pep/ee43840a-d85f-4ebe-95b9-294dfa402fe2%20quicksave.savegame?dl=0