[B2.1] [Bug] black screen after trying to join buddys server

[reaby]

Bug description:
Maniaplanet goes totally black screen.

Reproduce:
1. play at server
2. Click to join buddy at top bar
3. go to new server lobby
4. you try to join the server, but you don't have enough ladder points
5. black screen

[reaby]

Sorry, it triggers when you press cancel.