Trying to load onto War Thunder and I just get struck with this, Enlisted having the same issue only seems to be Gaijin games, my mate whos on play station was able to log on just fine.
Sometimes this is an issue with steam, try launching the game through the launcher in the installation folder as a temporary workarround.
Thing is I dont play war thunder through Steam I play it through the official launcher, so would it still be the same fix?
Then that wont help.
Here is the support page for the error: https://support.gaijin.net/hc/en-us/articles/200108572-Error-81110013-Unable-to-load-user-profile