I’ve run into this myself and stumbled upon several threads about similar problems when you get “Unable to load connection status“.
This means that you cannot see any status about the car’s range, current charging status or other information when you try to use the We Connect app on your mobile.
But there are solutions to this problem.
To fix the problem yourself, you need to reset by pulling fuse 19+20 which is on the left under the steering wheel.
When you have removed the fuses, wait a few minutes and then put them back again.
Tip! There are small white “tongs” that you can use to pinch out the fuses in the second fuse box that is on the right under the hood. Handy if you don’t have access to a small pair of pliers.
After 10-30 minutes, the car should be back online with 4G and everything works again. For me, everything started after 2-3 minutes (Had then had the problem for more than 5 days!).