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.

Roblox hack: Worker tricked into giving access to user data in popular children's game Roblox is a free game, offering creative space for people to make their own minigames within it ...

“Roblox” hacker leaks internal documents online after an elaborate employee phishing scam. A "Roblox" hacker claims to have leaked the internal documents of the gaming platform, which includes ...