Umbraco v 9.5.0, with uSkinned 2.0.3 and Our.Umbraco.GMaps version 2.0.6

This is my first time using this GMaps package. I have installed it, created a data type and put the API key in the data type field. I also have it in appsettings.json. I have a document type with this data type and this is all working fine locally. However when I put it up on the staging server and go in to edit a document of this type I get the following error:

Request error: The URL returned a 404 (not found): /umbraco/gmaps/googlemaps/GetSettings

In the Console is:

Failed to load resource: the server responded with a status of 404 (Not Found) - umbraco/gmaps/googlemaps/GetSettings:1

angular.js:15635 Possibly unhandled rejection: {"errorMsg":"Failed to retrieve Google Maps Settings","data":"","status":404} (anonymous) @ angular.js:15635

Does this seem like an actual API key error? The API key was set up for the correct domain, afaik and is different to the one I'm using locally. Or is it something I've done wrong on the deployment end of things. As far as I can see all the relevant files are there - App Plugins and dll file.

Thanks