Native map is not working


I’ve just started Ionic development but unfortunatelly I’m stucked on integrating native map.

I created a blank ionic application.
then I followed this tutorial:
Finally I uploaded my code to and tested in Ionic view on my phone.

but map is not showing, google api is key is valid.
Do you have any advice on this ?
My Source code:

Thank you!

I do not see that plugin listed here, so how about just building locally?

Thank you, I haven’t checked this documentation before. building locally the map is working and showing. Thank you!