I am trying to use the Google Maps API Platform properly.

I am a beginner in programming.
I tried to create a website using the Maps JavaScript API that when you press a button with the name of a city, it takes you to that location in the map, and a marker is placed there. I have been able to run the site, but I get the following three errors in the console. If anyone knows the cause, I would like to know how to avoid the errors.