Folium Maps broken in HTML - OSM Tile Server Blocked
Somewhat recently OSM enforced changes to their tile access policy. This is fair enough, this is a free service provided to the benefit of everyone, yet hosting tiles is not free. However, for tools which aren’t compliant, this results in tiles being completely blocked, making interactive maps significantly less useful:
This example happens when you use nbconvert to export a jupyter notebook to HTML when it contains a folium map - in this case produced with geopandas.