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.

Fix Authentication Failed, Error Code: 0, An error was encountered during authentication on Roblox by following the suggestions in this post.

Roblox error code 403 is caused by an authentication error. Here's how to fix Roblox error code 403 once and for all.

Can't long into Roblox because of the error "User Status May Not Be Up to Date"? Here is everything you need to know about fixing it.

For the most part Roblox works pretty well, but sometimes you get errors like ‘Failed to Download or Apply Critical Settings.’ Figuring out the problem is a bit of a head-scratcher. Regardless ...

In reality, there is no Roblox error code that tells users to call 911 because someone else is nearby. “Error code 1001” does not seem to exist on the platform at ...