Hey Bud! One important detail do you own the OGP or is it still hosted by Ultra-H? I have not tried having a server in Ultra-H, so I don't know...

It only means that port is being used by another, if you own the OGP and has a VPS, then you may try to find which software or program is using that port, if it is in use... change port to another port, avoiding default used ports...

If you don't own the OGP then asked the staff about it.

People here can help but we are limited to how you create your question...