Gem_Hunter Hey there, hope you are having a wonderful day! So your issue is a common one. IdleyHost's service has been overloaded and can not handle any more changes because the CPU and RAM have reached their limits. I would recommend to you to either wait for the next hours or just close the tab and come back again later this day. I can never tell you for sure when their service will become again stable but they will make an announcement in their discord server as soon as it happens!
More information about their service status could easily be found here: https://status.idleyhost.com/