Landscape Client not registering topic

Hello all,

I spun up two Ubuntu VM's. I can register the client on one but not the other. I followed the set up instructions the same on both, but can't get the client to register on the Landscape server.

Message says:

Please wait... We were unable to contact the server. Your internet connection may be down. The landscape client will continue to try and contact the server periodically.

Any suggestions I can try?

Thanks,
Leo