Maps not showing, Listing detail page slider neither

Hello guys,
GD used to work seamlessy till two days ago, when something must have broken although I have no idea what. My problem:

I see no map whatsoever across the website front-end: not as shortocodes and niether as Home/listing map widgets within GD template structure. Maps, on the contrary, are in place both in the user back-end Add a Listing section as well as in each Place page in WP Dashboard > GD > Places and in the Default Location setting tab.

Also, the Listing detail page show no phot slider (although pics are visible in the appropriate tab on the same page) and I just see a buffering ring at its place.

I have the core plugin + Recaptcha, Custom Post Types, Payment Manager and Advanced Search add-ons activated on a KLEO theme over the latest (today’s) WP version.

Before opening this thread I think I tried all the solutions already suggested on this forum, namely:
-all my places are in some category
-all categories have their specific icon
-Map widgets are in place in the preferred GD template “sidebar”
-I tryed already to deactivate all non-GD plugins
-I reinstalled GD
-Lat and Long should be set in the appropriiate, decimal format, i.e. 11.783096496203598
-Default location is well set and appears on the Defaul location tab in GD>Set Default Location tab.

A quick code inspections returns a noAPIkeys warning and two syntax errors related to missing links in the theme menu + a third error related to GD: cannot read property ‘GetCenter’ (see attachment). This latter, however, disappeared disabling an Ajax search module, although I do not really understand the why.

The only substantial change I’ve made to my GD installation is that I cancelled one CPT which I had preciously created for test purposes.

I really do not know what else to check to address this issue. If anybody in house or in the community can lend a hand it would be really appreciated.
Thanks a lot