what is the problem?

hi
that is a Data Execution Prevention error on your pc. windows doesnt like what happened. if you go to admin tools, events, there should be a log which may give more detail.
when are you getting this error? logging in, entering a lobby, playing a game?

I am having this same error.

I have checked my router's firewall & allowed UDP/TCP on port 16000 AND gone into the windows Firewall and done the same.

I have also tried UPNP in Voobly as it is enabled on my router, but I am still getting this error message when I tried to join or host a game.

Any suggestions?

Thanks,

hi
disable upnp on the router. apply/save and also at voobly. set port 16000udp in the settings. [not tcp]
from options at the top of a lobby, do the game and network diagnostics and show here.
describe whats happening.

When i am joining a game it is showing error 50000000

Hello Rock, make sure your firewall/antimalware allows Voobly and the game
Also the only port you need open is 16000 UDP

You can also follow what kitt said!