In the newer versions of the SGOS code the HTTP debug process has changed slightly. The URL is still https://x.x.x.x:8082/http/debug
but you will now see the following screen:
Now to get some meaning full information in the HTTP debug you will want to click on HTTP this will take you to the page https://x.x.x.x:8082/http/debug_http_all
from this page you will want to select the option 'Debug' then seect 'Submit':
Then all you will need to do it replicate your issue and refresh the Debug page.