Yes. I understand it was working before. The difference is that you now have eisy-ui installed.
Explanation:
When eisy-ui is installed, it takes care of the connectivity to portal. IoX no longer does.
eisy-ui also takes care of the "portal approval" as it is tied to the portal connectivity. The approval process involves an exchange of tokens with portal through the proxy connection which IoX can no longer do.
So, when you are using AC and connect to IoX directly (8080 or 8443), the Portal tab won't work. If you use AC and connect to eisy-ui (no port specified), then the Portal tab will work just like before. Note that you can also manage the portal approval using eisy-ui's web interface.
That is not normal. Can you try the URL in a browser? That should give you an xml doc. You may have to accept the self-signed certificate.
You should also be able to navigate to https://eisy.local