Unable to load content when launching action with mobile app

Am testing out the WorkflowGen Plus v2.7.2 with our internal WorkflowGen v7.22.5. I am able to login. However, when I try to launch an action or try to create a new request, I keep on getting this error message:

Unable to load content

Have tried it on several different processes, even a simple one I’d created recently, but to no avail.

Has anyone else encountered this problem? And if so, were you able to resolve it?