What is the URL of the page where you are having this problem?
Here’s a link to this page
There is the following error on your site when trying to use the Google Maps API
You must enable Billing on the Google Cloud Project at https://console.cloud.google.com/project/_/billing/enable Learn more at https://developers.google.com/maps/gmp-get-started
Places API error: BillingNotEnabledMapError
https://developers.google.com/maps/documentation/javascript/error-messages#billing-not-enabled-map-error
Do I understand correctly: using the Google Maps service is paid?
After using the monthly free limit, yes.
Is there any way to replace it?
No, we don’t have an option to replace it as all the API that allow geolocating are paid and Google API is the cheapest one plus every month they will grant you $200 in free credits.
You will probably not go above this limit if you have a small site and use the API in the Publish form only.