If KRNL-Injector failed to find the Roblox process, delete KRNL App data and see. If that doesn't help follow the solutions mentioned in this post to resolve the issue.

A chat-based Roblox exploit appears to be causing players to lose account access after joining specific games. Multiple members of the Roblox community report falling victim to the exploits, with ...

Roblox also banned the owner of Crosswinds [A.2], which appears to have been the first game to abuse the exploit and connected accounts, the RTC Twitter account report s.