TOPIC: Map not visible / error massage after installation

hello. I have just installed hotspot core for test reasons but the map is not shown (see attached screenshot)
I would like to check urgently if hotspot is the right extension for my projects and need now simply help that its running.
Brg., Rainer

Solved
The Google API Key has been corrupted during copy / past. you have to use the copy button and the end of the key on the Google API key page.