i see.
Set your BASE URL = "https:/" <-- notice only 1 slash
and then in your parameter string, build the entire required URL.
Using a new feature in the latest 2466 build, AIM no longer inserts the "?" divider between the BaseURL and the Parameters
.... IF your parameter starts with a "/"
So, you'll need to build a string like:
"/CustomerA.learnlinq.com/WebAPI/v1/Cultures"
then it should combine at runtime and be fine.