How to resolve traceback: "xpress.InterfaceError: Incorrect control name; check name and license type"?

We are trying to access xpress in Python via Pyomo. We have no issues installing xpress and solving a simple model with the xpress interface. However, when we attempt to access xpress via pyomo we received the following traceback: "xpress.InterfaceError: Incorrect control name; check name and license type". We have a commercial license for xpress and we've confirmed that the pathing in python points to the correct license; however we're still experiencing this traceback.

We first tried contacting the Pyomo team and they believe the issue is related to an "environment variable setup for xpress, to point to the license", and that the issue is with how we have xpress configured.

We next tried following the troubleshooting steps in this forum post, but continued to receive the same traceback: https://community.fico.com/s/question/0D52E00005p8aKGSAY/xpressinterfaceerror-incorrect-control-name-error

Our only lead as to what could be happening at this point is that when we run the code to instantiate the correct solver license from the forum post above, we receive different "n" values each time we run this code: " n,string = xp.license(0,string)".

Has anyone else experienced this issue in the past? Any further troubleshooting steps we can try?

Thanks!

Will