Active Matter error codes and crash fixes
Every error, crash and connection failure we have a fix for, one page per code. Before the fix, each page says whether the problem is your machine or the studio's servers — because if it's theirs, no amount of verifying game files will help, and the only useful answer is whether it's happening right now.
Things you can fix
Crashes, install faults and driver conflicts. Find your symptom, work the steps in order, stop when it launches.
Active Matter: Gaijin account won't link to Steam (fix)
Launching the Steam version logs you straight into a new, empty account instead of your existing Gaijin.net account and its progress — the settings menu shows "You are logged in via Steam," and choosing "Log Out" only offers "Log in via Steam without Gaijin.net" rather than a way back to your original account. Separately, some players can't even complete the Steam purchase because their Gaijin account has no confirmed email.
Active Matter crashes using the Vulkan graphics API (fix)
The game crashes to desktop specifically when running under the Vulkan graphics API, sometimes tied to a graphics driver failure rather than a clean error message.
Things you cannot
Queues, capacity limits and login failures. These are server-side — every page below links back to live status rather than a fix you can perform yourself.
How these are graded
Every fix step carries a label. Confirmed means players demonstrably got back in with it, or the studio said so directly.Reported means it worked for some people and not others. Unconfirmed means it's circulating and there's no evidence either way yet. The distinction is the point — a page that lists five fixes with equal confidence costs you an evening.