I am playing on a P2P game (Start New Game -> Choose number of players -> tick the box Peer-to-Peer). Droping a class with either "!dropclass" in chat or "dropclass" in console leads to the following error in console:

It's not possible to play it in P2P. You need a server. There is no other solution bcus of anticheat. Just the server is aware of your current class. So there need to be a sync between the server and the client.

That's unfortunate, I was hoping P2P would kind of start a real server in the background with only allowing P2P connections. P2P setup is super simple and I would not have to download all the addons twice (for my client and for the server) that way.
Thanks for the quick answer, I've setup a server now and it's working fine :)

[[TTT2] Classes for Trouble in Terrorist Town] lua/classes/shared/sh_hooks.lua:251: attempt to call method 'IsActive' (a nil value)
1. v - lua/classes/shared/sh_hooks.lua:251
2. unknown - lua/includes/modules/hook.lua:84

this normal? or what am i doing wrong here?

We released the new version today, please try again and check whether this issue is solved. Thanks :)

Having occasional issues where players do not spawn with the class selection option. No idea what is causing it.

Does P2P (Peer-to-Peer) work now? Not seeing anywhere on the workshop page where it says it doesn't.