I have checked your Website now - You have not added your IP in IP restriction Tab - Google Cloud Console.
To add that: Login to Google Cloud Console :
- From the Left menu, go-to 
API & Services >  Credentials and click on Create Credentials. 
- Create a Key named 
IP Key and under the IP restrictions tab add your IP Address 
- Save all the changes and login to your Foodomaa's Admin Panel.
 
- Go-to 
Admin > Settings > Google Maps and paste your both keys here. 
- Google APIs take 5-10 minutes to reflect the changes on your website.
 
From the screenshot you sent, it seems your IP Address: 43.255.152.5
Please refer to the following documentation ;
https://docs.foodomaa.com/configurations/google-maps-api-keys