This is something that seems to happen every so often for me. I’ve tried to narrow it down and I think that it occurs when there is some intermediate pop-up between the Next Turn button and the Quarterly Screen proper. To back up a little bit this is what what normally:
Next Turn - No special event
Everything is fine
What happens when it crashes:
Next Turn - Special event (like going from a deficit to a reserve or an election)
Music Plays and Screen freezes
Usually the problem can be resolved by closing the programme down and loading the autosave; which takes me immediately to the Quarterly Screen, skipping over whatever event the music was about. The exception to this is an election screen, which the autosave loads immediately. Sometimes I’ll have to load the autosave twice to get the continue to next term button but it never properly crashes otherwise.