I installed update 3.26.0.31 and cant host, but i can host whit 3.6.0.29.
Ports is open in my router.
But when others players want enter show a message that says players maximum, indicating that my game is full. but I'm alone in the room.
zorry for my english.

Which method You're using for hosting:

- WormNET's in-game option
- WormNAT
- ProSnooper or WheatSnooper ?

delete your firewall rules after updating the game then add the rules again.

Update your snooper.