Today, with no changes in our code, Google Maps is not working, we are getting this errors today:
Uncaught TypeError: Cannot read property \'entries\' of und
I found the solution to the problem based on this Cannot read property 'entries' of undefined in http://maps.googleapis.com/maps/api/ and on @ajayel answer's: "Google changed their Maps API script and started using the variable Map which broke our site November 2017. Renaming the Map variable to OurMap fixed the issue for us."
The issue here is that we was also using the name Map for our main map operations javascript library, we changed it, and everything started to work fine!