Getting a KeyError in app.py logging configurator for apache superset

Question

Superset (with Docker) was running on our desired URL until recently, when a KeyError in the app.py file came into being. We are unsure as to how we would handle such an error. This is what appears when we try to access the Superset URL:

From our understanding, the problem might stem from there being a client side session, not a server side session (using redis, or similar).