Cant Join or Load into any server.

[humble gust]

java.nio.file.NoSuchFileException: /lua/aegis_narc/player_activity.

Seems to fail to load specifically here, that does not seem to be a vanilla game file

Since we do not have anything aegis

In which case, I recommend doing a full game reinstall.

First, uninstall the game, then go to "Steam\steamapps\common\ProjectZomboid" and make sure there are no leftover files or folders there.
After that, go to "C:\Users\YourUserName\Zomboid" and delete everything there except the "Saves" folder.
Then just install the game again and see if that helps.