Hi,
I have a recurrent error when trying to open portals items in ArcGIS Pro, the .pitemx files. It is a 'failed to open' error as attached. On same portals, ArcGIS Desktop .pitem files do open correctly. Initially, I suspected the .pitemx files to be corrupted but the same files do open from other networks.
Now, my guess is something related to firewall! What are the specific ports ArcGIS Pro using to connect to portal to open .pitemx files?
Thanks