Arma 3 Headless Client Steam Authentication Failed Hot |top| [TRUSTED]

Then you dig deeper into Arma3Server.rpt :

Ensure your HC environment meets the absolute baseline: arma 3 headless client steam authentication failed hot

If the HC can’t write to its profile directory (common with permission issues on Linux/Wine), BattleEye fails silently, and the Steam authentication error appears as a side effect. Then you dig deeper into Arma3Server