The following error appears when opening Top > Services > Applications :
"Unexpected catalog service error. The requested URL returned error"
While opening this page POA accessing http://apscatalog.com and tries to get the list of applications. If Management Node and Privacy Proxy server have no internet access catalog URL cannot be resolved and the error is thrown.
This behavior is fixed in POA 5.5.8, you can request a sandbox with newer version.
The following workaround that can be applied to make Applications page loading: add to
/etc/hosts on POA Management node the following line: