I have WP Google Map Pro on my side, installed with the Theme monstroid2. Monstroid2 provide a google maps api-Integration. Is there any way, that i can use for WPGM the Theme API-Integration?
Your API is loading multiple times that mean you are using more than one map plugin or api come with your activated theme.
Please disable any other google maps plugin or theme API you have used to avoid this issue and your issue will be resolved.