RefererNotAllowedMapError get message site URL to be authorized

In ionic 4.7.1 on IOS I try to access Google Maps services and get the following error:

“Google Maps JavaScript API error: RefererNotAllowedMapError

Your site URL to be authorized: ionic://my-domain/home/appointments-new/appointments-search-fields”

The request with an ionic domain instead of https domain and causes error of CORS.