OpenStreetMap and icon do not work

Ciao Stefano,

Some OpenSTreepMap Styles does not work becuase:

1. It's developer stopped support of that style for various reasons. Don't forget they were free.
2. It was created for global view, and if zoom is too big it doesn't shows details.
3. OSM are free, made by community so may not include all locations (buildings / streets). This is not Google Maps or Apple Maps with million of budget.

In general most styles works, here is example from Forum User Website (I made screenshot 3min ago)

About missing icon - maybe you forgot that you disabled Font Awesome in SPPB Settings. Use default icon if you don't need extra FA files.