Just patched my game, and restarted. I’m in online offline mode (not true offline). Played for a few minutes and then pressed P to open my passive tree. Game closed. Tried three more times with the same result.
Tried again using the interface button to open the tree instead of keyboard. Same result.
Tested all the other menus. They work fine. Just passives.
Tested another, old character in the same mode. Same crash (so it’s not something specific to that save).
Tested the first character in full offline mode. Same crash.
Tested with a brand-new character, full offline. Same crash.
AAAND verified my files on steam 
That fixed it! Closing this topic.