Cannot get Ombi V3 to work

Can anyone help me get Ombi V3 working with Quickbox? I’m having constant crashes with v2, and the developer of that advised to install v3.

I tried leaving Ombi installed thru the GUI, and then deleted everything in that directory, and then installed V3. I couldn’t figure out how to get to http://mydomain/ombi

I have to use http://mydomain:port/ombi

I tried changing the port on ombi v3 to 3000 (which i found reference to in the ombi.conf file.) but it didnt work either.

Can someone please help?