I’ve checked the files. In Player-prev.log, which is rather large, what stands out is the extreme number of repeated errors of this type:
Graphics.CopyTexture called with mismatching data size
This is, as a result, a likely duplicate of Joy’s bug reported here (she mentions the same error message being repeated a large number of times and also crashes after around half an hour):
Edit: After checking Xopuc’s save file, while the character also uses magic, it seems to be fire magic exclusively, so the ice-magic angle can probably be discarded. Many of the observations in Joy’s post also cannot be found in Xopuc’s crash log, which also notably has the game crash less than three-and-a-half minutes after starting.