This is most likely a problem on your end. I tested all my servers, they run just fine.
You may need to log out and back into your Minehut account.
If that doesn't work, try disconnecting your internet, and reconnecting, or reinstalling your internet browser.
And if none of these work, you may need to either open a support ticket with Minehut, and if they can't fix it, you may have to enter the DANGER ZONE and repair core files, and if that doesn't work you may need to entirely reset your server.
! Before restarting your server, make sure you have a copy of any Skripts, Config Files, Worlds and more that you want to use in the server!
Hope this helped!