If you’ve tried all of this and still can’t get in, it might be time to contact Roblox support directly – they might have some additional insights into your specific situation.

Now, select the Local folder and find the Roblox folder inside Click once on the Roblox folder, making sure not to open it, and press “Shift + Delete” ...

Can't join Ready or Not lobbies because of the "Can't Connect to Host" error. Well, here are a few ways to fix this problem.