Hallo Angen
I was playing a match in single player on Solus 4.1 MATE. I updated the OS and the problem did not happen again thus far.
I unplugged my wi-fi dongle too. 0A.D. always worked on Zorin 15.1 based on Ubuntu 18.04.
I can't find my event log right now, but when I looked at it, it had a lot of entries for "Radeon". My Radeon 6670 graphics card.
The crash happened while I was trying to take over a tower in Alpine Valleys(2).
Other than that I can't tell you much.
Great game however! Very detailed and engaging. I f it continues to crash on Solus, I'll just use Zorin 15.1, where it always worked without flaw.