I'm trying to get the Spotify Hello World app running (https://developer.spotify.com/technologies/apps/tutorial/) and when I run the app in Spotify it doesn't load anything. Using the Inspector, it shows nothing in the head and body of the HTML. I've verified time and again that there actually is something in my index.html file.
I do have a developer's account and I am a premium member.
Does anyone have any suggestions for me to get the app to run correctly?
SOLVED:
within your question title. – Matthias