Roblox may not be letting you join a game due to several common reasons. Firstly, ensure your browser is up to date. Outdated versions can cause issues, so try using the latest version of Chrome, Firefox, or Microsoft Edge.
Another reason could be cache issues. Clearing the cache on your Roblox app can help remove any glitches. For iPhone users, go to Settings, then iPhone Storage, find Roblox, and offload the app before reinstalling it.
If you face problems with the browser or the app, try closing and restarting them. If the issue continues, consider using a different browser or uninstalling and reinstalling the Roblox app.
Sometimes, domain settings or unwanted apps on your computer can cause conflicts. Edit your domain settings or remove any unwanted applications to resolve these issues.
Lastly, check your internet connection. Ensure it is stable and secure. Note that Roblox may not work on most school Chromebooks. Also, make sure your operating system and browser are up to date to avoid any compatibility issues.