This error is pretty common and it’s pretty easy to fix.
If you’re using dedicated server / VPS:
Check what is utilizing the port by running any of the following to see occupied ports in Linux;
sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTEN
sudo lsof -i:22 ## see a specific port such as 22 ##
sudo nmap -sTU -O IP-address-Here
If all else fails, we simply recommend just changing the port to some other port and if it still does not work check your firewall settings such as IPTables or UFW.
If you are still having issues contact our support, if you have a dedicated server with us you can simply request for interference!
If you are using Minecraft hosting:
There is no way for you to fix this yourself, simply contact us!