Currently running Forms version 10.2.1.
I have the Forms portal with two installations of Forms. The internal side works fine. The DMZ side however will prompt for credentials, and when it receives valid ones, will just keep redirecting showing the LFDSSTS URL. It never loads the web page. See the attached .gif file. This happens on all browsers and different computers. I believe this started happening after implementing single sign-on, though I can't say for sure as everything appeared to be working fine until recently (and there hadn't been any changes other than that).
I followed the following documentation:
https://support.laserfiche.com/resources/3481/hosting-laserfiche-forms-10-in-a-perimeter-network-dmz
However, the problem persists, and now I cannot log into Forms Config on the DMZ. I get the message: "The requested service (IRoutingEngineService) may not be running. [LFF3004-UnableToOpenServiceProxy]"