Nothing has changed on my system since I last played a week ago except for the update to the current version of 7d2d. When I try to join the server to play it starts to load and then CTDs.
1st player log crash file: https://pastebin.com/KBihJ1vW
2nd player log crash file: https://pastebin.com/HP4enXkE
EDIT:
Seems the offending files: zombies.bundle, items.bundle, and data.unity3d were apparently corrupted with the update to the new version and had to be deleted and then verified and retrieved by steam in order to start playing the game again.