I get the following popup messages when I login to Azure Portal, go to Azure Active Directory, select my app and enter API Permissions:
"Your session will end in a few minutes. You will have to refresh your browser to start a new session."
"The portal is having issues getting an authentication token. The experience rendered may be degraded. Additional information from the call to get a token: Extension: Microsoft_AAD_RegisteredApps"
This happens in Firefox, Chrome & Safari, and does not go away after logging out and then logging in again. It doesn't seem to be a temporary glitch as the exact same thing has happened for three days in a row. When I try to add permission for Microsoft Exchange, activity starts, but nothing happens beyond that