Another way to fix any possible DNS-related issues is by flushing the DNS cache. The fact that you are unable to easily move between several Roblox servers may be due, at least in part, to an ...

Also, allow the Roblox Player and the ports required by Roblox through the firewall. Disable your VPN to boost your internet speed and flush the DNS cache to fix network connectivity issues.

If you get Disconnected Error Code 272 on Roblox, Lost Connection due to an error, follow the solutions mentioned in this post to resolve the issue.