If you get an unauthorized message in the UI when you submit a form it is due to your network configuration. This error is caused by our protective measures for cross site request forgery.
I would assume you are seeing an error on the admin page to indicate your proxy configuration is invalid. If not, ensure you have the correct X-Forwarded-Port, X-Forwarded-Host, X-Forwarded-Proto headers set when behind a proxy.
If these values are not set, or are invalid then when we compare the Origin header against the request we will fail our CSRF assertions and return a 401.