If you find that you are having difficulty logging into or out of Roblox, please be sure to first click here and try the steps supplied in that article.
If those don't help, check to see if your computer's clock is currently accurate. As strange as it may seem, the computer's clock being a little off can lead to various issues. The following pages can assist with this process:
If you still can't log in you may need to reset your password. For assistance with this, contact Customer Service.