When configuring the web service in a Workflow environment that was using http to use https we received a 404 error.

We found that the service tries to contact a specific site  /forms/api/BusinessProcess/Listing, and when testing with Chrome we get a 404 when trying to reach this site with https, but not with http (where it downloads a file successfully)

We can reach the standard /forms site with https without any problem.

What could cause a specific site to show that it does not exist just by changing the protocol?