If you have encountered the Bad Request, Roblox Error Code 400 on your Windows PC, you can apply any of the solutions in this post to fix the error.

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

Creating a game on Roblox, while far easier than making one from scratch, is not a cakewalk, given the number of possible errors users might encounter on their design platform.

Basic Reinstall: Uninstall Roblox through your control panel (or Apps settings) and then download and install a fresh copy from the Roblox website. This is your first line of defense.

In some relatively rare situations, two servers may take too long to communicate (a gateway timeout issue) but will incorrectly, or at least unconstructively, report the problem to you as a 400 ...

Clearing your cache is unlikely the fix for the majority of 400 bad request issues, but it's quick and easy and worth trying.