Error 122 while installing zoomapps-sample-js onto Zoom Client

I have created a zoom app on marketplace and copied the credentials into the .env file inside the cloned repository. I am using ngrok to access the app from the internet. I am using Ubuntu 20.04.

While opening the zoom client app, I am greeted with the Error code 122 inside the popup window from the Zoom Client.

So far, I have tried using in Incognito windows and relogging into my client window, but to no avail