Problem with home map

Hi. I created a card with my home map and all the light switch inside.
It was working very well with all browser till few days ago.
Now Internet Explorer (last version) and Google Chrome don’t show anymore the map (only a grey strip in the top of the screen.
Instead with Mozilla Firefox and mobile browser the map is visible.
What happened ? Maybe I need to install something?
Thank you for assistance
Emilio Chiave