I deployed a simple application on the cloud. It is using spring boot and velocity. The test case just returns Hello World in html format.
I can see that the application is called via GET, and it returns correctly with code 200.
However Atlassian instead of rendering the returned result spends quite some time displaying a timer then pops up a message Something’s gone wrong.
I debugged using the browser and I can see there how the call is made and code 200 is returned.
I am using authentication none, so I do not think this is an authentication problem.