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

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

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 ...

Roblox users are reporting widespread login issues and receiving an "Unknown error occurred" message.