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.

This security issue will affect approximately 4,000 users and developers who attended the Roblox Developer Conference between 2017 and 2020.

With Roblox available on many formats, here's everything you need to know about the game, including tips on how to play safely online.