In an update on September 17, Valve announced fixes for game launch and Workshop tools, verification errors when launching through Proton, and stability fixes.
Mention of Linux via Proton refers to a specific launch method and is not a substitute for checking hardware compatibility. If the problem occurs when opening the Workshop tools, compare it to the normal launch of the game itself: these are different scenarios. After updating, repeat the same step and save the error text if it remains. The publication does not promise that all user additions will automatically become compatible. Before changing a set of modifications, it is useful to check the basic installation and launch conditions of your version.
Sources and checks
September 17, 2026 Update · Steam
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