Roblox seems to work smoothly with Google Chrome compared to other browsers at this time so be sure to try this solution at this point. Fix #3: Reset web browser settings.

ROBLOX users may find that their screen is stuck on Configuring ROBLOX or that it goes in a loop. If you see this error, here's the working fix.

How to fix Roblox 266 error code Here are some of the possible solutions for the Roblox error code 266 that you can try to fix the problem on your end.