[BUG] - Cannot access webpage

[ThorJonsson]

Describe the bug
I get

Application error
An error occurred in the application and your page could not be served. If you are the application owner, check your logs for details. You can do this from the Heroku CLI with the command
heroku logs --tail

When I try to view this streamlit app after having discovered it in the official gallery.

To Reproduce
Click on the link in the README.

Expected behavior
See the app.

Screenshots

Environment (please complete the following information):
Windows 10, Google Chrome, 97.0.4692.99 (Official Build) (64-bit)