Plug-in View is missing in the vSphere Client

A specific view is missing in the vSphere Client.

Problem

Navigating to some extension point shows Page Not Found.

Cause

The view was not loaded by the vSphere Client.

Solution

Verify that the view URL is correctly defined in the plug-in manifest file.

Verify directly that the URL is reachable from the plug-in server, bypassing the vCenter Server reverse proxy.