If you are unable to see the AdminUI Web page, you can troubleshoot using the below steps.
AdminUI only loads a blank page
With this blank page, we refer to an empty page with the text "AdminUI" on the top left corner. Also, if you open the console, you will see a list of 404 errors on different files.
This is the index page, and the console logs are saying it cannot find the UI files that load the SPA (Single Page Application). This happens when AdminUI is not running from the root of the URL. Maybe your AdminUI URI is something like 'https://generalweb/myadminui'.
To solve this, you have to update the base path on the index.html of AdminUI.
You could update that path manually but AdminUI generates a new index.html file every runtime. To solve this AdminUI includes the MSbuild property AdminUiPath. Find an example of how to use it here.