ZTNA is not functioning as expected.
Here is what I have done so far:

1. Built the Publisher

2. Registered the Private App

3. Created an RTP policy

2.

Here is the configuration of the private app I created.

3.

Here is the configuration of the RTP policy I created.

When I performed troubleshooting for the Private App, I encountered an error.
However, the publisher status is shown as "connected."

What could be the possible causes?

Here is the error message.

Here is the status of the publisher: it is showing as "connected".