Fix #3: Update Roblox installation files. If Roblox is still showing the same crash error, the final solution that you can try is to update certain files in the installation folder.

When you’re trying to play Roblox and keep getting the “Bad Request 400” error, it can put a wrench in your plans.

Re-Install Roblox If all else fails, the final solution is to delete the game and re-install it. Don’t worry, from my experience, all your progress should be saved and safe.

How to fix an error occurred while starting Roblox? If you’re experiencing the error occurred while starting Roblox, you’ll have to do a number of troubleshooting steps to fix the problem.

If Roblox is not downloading or installing on your Windows 11/10 PC, restart your PC and if that doesn't help, use the fixes discussed here.