Why does Roblox keep crashing? If Roblox keeps crashing on your PC, it may be caused by one of the following causes: Hardware limitation.

The “An unexpected error occurred” error message effectively prevents you from launching Roblox on your gaming platform. What causes Internal Server error 500 in Roblox?

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.