Not sure why...but for some reason Webviewer with google maps in FM 15 on desktop it keeps buffering, but on iphone and ipad it shows the map.
What happens if you take out the formed URL and pop it in a browser?
It opens it to the correct address.
What's an example URL?
If it's using https://, do you also have an SSL certificate installed for your filemaker server?
When I go the properties of the url it has the https
How do I find out about the SSL certificate? and to add it?
It works with MAPQUEST just fine.
You still haven't provided an example URL of what you're trying to embed. Google maps blocks embedding for a lot of reasons. One reason is it does not want its resources embedded by a non-secure website. Google also wants you to have an API key to embed a map officially:
Developer Guide | Maps Embed API | Google Developers
You may be better off using Google's API to integrate and display maps via the approved method. The community already has a lot of resources if you search around.
Like this one: Google Maps API
And this one: Web Viewer & Google Maps: The Basics - a question
Another one: Web viewer & Google Maps: how to avoid side panel?
and many more...
An SSL for filemaker would be installed on filemaker server. If you are not hosting on filemaker server you would not have the ability to host filemaker in an SSL environment.
One important note, to use the Google Maps API, you now need to have a credit card on file with Google.
Mapquest is sounding better every minute.
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