Hi! The only server it connects to is the Twitch chat servers. If you are not getting a connection to them, then one or more of the login details will have been entered incorrectly. You can logout on the file select screen (under your username).
You will need to enter your username, with capitalization were needed. Along with your OAuth code, including the ‘oauth:’ at the beginning of the code
If your friend needs any more help the best place to get it is the Cleverbones Discord. Which you can find a link for on our site www.cleverbones.co.uk or from directly within any of our apps