High Ping can occur due to many reasons. Check your internet connection and cancel all downloads to fix the High Ping issue in Roblox.

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.

This is because a slow or unstable internet connection can be why the Roblox Error Code 403 occurs. Perform a speed test to check if your internet connection is running fine.