I got this error randomly on map loading. If server runs some map, most of the times i can join, when server changes map before loading i got black screen, alt tabbing shows error map_nextmapname and if i press enter it goes to desktop. I checked common error topic, nothing like that there. Thanks.

Do you have the DLCs?

Yes, installed. Tried and with steam version and with reload3d one.

viewtopic.php?f=30&t=9515

As i said i checked this topic. It's not loading image error.