Virtualmin Install (hostname: Name or service not known)

I am currently attempting to install Virtualmin however I am hung up at the hostname portion. I have set a host name to an actual domain however it does not seem to be accepting it. I will confess it is one of the new TLDs, is there a known issue? I attempted to set it to, is this not allowed or is there a work around? I thank all in advance who reply and my highest gratitude to those who offer help!

hi, what is the output of hostmane and hostmane -f ? they should respond both same eg ( - host or server or whatever you did setup)…

If those commands give you different output then your hostmane is not setup correctly.