Client left game (Steam auth ticket has been canceled) : r/tf2
Disconnect: client left game (steam auth ticket canceled) · Issue #4947 · Facepunch/garrysmod-issues · GitHub
Steam API AuthenticateUserTicket error response: {"response":{error":{"errorcode":3,"errordesc":"Invalid parameter"}}} for authentication ticket DummyAuthTicket - Playfab Community
How To Recover a Steam Account That Has Been Hacked
Steam Community :: Screenshot :: steam auth ticket has been canceled
Steam Auth Ticket issues - TheVille
Steam auth ticket has been canceled" | Monolith Servers