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.

Popular games like Roblox, FIFA, PUBG, and Minecraft are among 28 games that were exploited by malware between July 2021 and June this year, affecting more than 384,000 users via nearly 92,000 ...