I don’t understand Deutsch, and I don’t see any date or driver-related info on your screenshot, just card and system infos.
ETXreaL 0.3.0
Treiberversion = Version of driver: 301.42
Haven’t found any information about OpenGL on the german nvidia side for this GPU.
But due to NVIDIA GeForce GT 540M @ notebookcheck.net it supports OpenGL 4.0.
Then I dunno… When I updated mine I had no longer Null like you have but my OpenGL version. And all the people having Null then updating got it working so far 
Hello Kic,
Bad news first: The ET: XReal project is inactive and will not continue development.
It has been inactive (dead) since around 4 years now and the development team has dispersed.
However now the good news, there is a very active project running called ET: Legacy. We are currently one ticket (bug) away from a major release and milestone. In order to speed up the development we are always looking for active developers (coders, 2D-/3D-artists, Level-Designers,…). If you want to contribute to the ET: Legacy development and ensure that this milestone in video gaming history is granted another decade of glory, simply visit us at #etlegacy on IRC.
By the way, to answer your second question, there are no servers running ET: Xreal. However we are happy to provide you with a list of active servers running ET: Legacy 2.74.
Cheers and we are looking forward to meeting you on our public IRC channel!
kemon