Google Map showing in one site not in the other (identical sites)

In our Montessori Site the google map does not show up here: https://montessori-international.com/map/
but it shows correct here:
https://phuket.click/map/

also
https://montessori-international.com/map-box does show the map.

All plugins installed are identical
the template is identical
the css is identical

I am a bit lost why it does not show on that specific site - it showed up yesterday and this morning without any problems but because we were trying to solve a javascript probem caused by wpmudev hustle we had deactivated lots of plugins but meanwhile reactivated them again in all sites.

Access is granted in both sites.