Uncaught runtime error (windows branch) on Authentication tab

[diothar25]

On the current Windows Branch, when I click on the Authentication tab to enter my user information and generate my Bearer Token, the page shows an Uncaught Runtime Error.

If I click on the X in the upper right-hand corner, it just loads the error again.

However, if I reload the page, it works as long as that session stays valid. Happens in both Edge and Vivaldi browsers. Happens in Private Browsing/Incognito mode. If I close the tab and come back, it happens again. But the resolution is to reload.

I did modify the start attribute under scripts in package.json to
"start": "react-scripts start",

Attaching screenshot with Dev Tools open as well as a .har file

localhost.zip

[maxzz]

I see there are two separate problems. The first is the CORS problem. The second react code does not check for the existence of a DOM element.