I installed this today and the first thing that popped out on Dashboard was:

🔥 IMPORTANT 🔥

Google Maps Widget is NOT compatible with the new widgets edit screen (powered by Gutenberg).
Install the official Classic Widgets plugin if you want to continue using Google Maps Widget.
Or install the free Map Block plugin as the fastest way to add a great map to any post or sidebar.

What`s this? I use Eelementor and Astra Themes. For posts, I use Spectra from Astra.

Hey,
That's correct, the plugin doesn't work with Gutenberg.

You can easily add the map via Elementor or Astra themes. If you need any extra help with the plugin, please contact our support via email, and our agents will help you out with more details :)