We moved so I changed the GPS coordonates on the device page in the dashboard.
They’re ok, I’ve tripled checked (42.22991800, 5.32035500).
The dashboard shows them as green.
However, in the map, the device appears in the middle of the Mediterranean sea.
I would say, your sensor is shown exactly where you have entered it. You can check on the map, zoom in, on the top right you see the coordinates where the mouse pointer is.
Wild guess: you have the wrong coordinates.
From your IP address, it seems you are located in the south of France. Could it be your position is 44.23N 5.32E (instead of 42.23N)?