I created a restricted access role, vm admin and browse datastore. I can login with this user to the client, browse and mount an ISO without an issue. When I use the web client and try to mount an iso from datastore, it brings up the mount window and shows loading.
Do you have to specify permissions differently so you can mount an iso in the web client as opposed to the full desktop client? Why would it work fine in the desktop client and not the web client?