@grena : Sorry no luck, I removed every config except latitude, longitude et appid and it still shows Loading…

@grena I also have the same behavior. Here is my config :

{
   module: "MMM-MarineWeather",
   header: "Marine Weather",
   position: "top_right",
   config: {
      latitude: 46.829853,  // Latitude 
      longitude: -71.254028, // Longitude
      appid: "414492aa-c717-11e9-a3da-0242ac130004-4144953e-c717-11e9-a3da-0242ac130004",
      dataSource: "sg",
      params: "airTemperature,windSpeed,windDirection"
   }
},

And result is :