Incorrect error message when re-registering a Controller

Current Behavior:

• The Controller gets registered successfully during the first registration. When re-registering a Controller after deletion, the UI displays a "Request Failed" error on submit, even though the Controller is successfully registered in the backend and only becomes visible after reloading JOC Cockpit.

Steps to Reproduce:

• Register the Controller cluster through JOC Cockpit by providing the primary and secondary Controller instance's URL.
• Then delete the registered Controller cluster from the JOC Cockpit.
• Reregister the Controller cluster.
• An error appears stating "Request Failed" when clicking the Submit button, as indicated from the attached error.jfif

Desired Behavior:

• Re-registering a Controller after deletion should complete successfully without any error message, and the UI should immediately reflect successful registration without requiring a reload.