Soooo. This is kinda awkward.
What i did was the following:
I enabled all the stock widget crap (in the hope i missed an usuable GUI), just to find a function of crudemenu "enable local lua" (or similar).
I enabled it, restarted the SP match, whereafter the loading screen hangs on "loading Lua", with 25% cpu usage (quadcore). So i removed the testing version, tried stable, same thing.
So since i really wanted a game of CA, i looked on my backup drive for an old version, and i found Stable-5274, placed it in Mods and there we go. My familiar IceUI.
Everything was working like usual so i tried (no clue why) CA-Testing-6690 again, and totally unexpected, it loaded up IceUI, and all my other mods. Even when i disable "local widgets config"-widget (what does this do?), my own widgets are working fine.
Anyway, im glad that it is working.