Connector cannot get company name

I am setting up connector, and am able to get the adapter settings configured to where they pass the "Test Settings" button.

However, when I try to create a "New Integration" and select Microsoft Dynamics GP, I cannot see anything in the list of companies.

The official docs just tell you to check your settings, but they appear to be fine.

Can anyone point me in the right direction to start troubleshooting this issue? Why would I be able to pass the Adapter Settings but not get a company name?