The parking companies are the worst kind of parasitic leeches out there. I had a similar experience when travelling to Denmark (I live in Norway). The sign said

The parking companies are the worst kind of parasitic leeches out there. I had a similar experience when travelling to Denmark (I live in Norway). The sign said that you can pay with ParkLink, which I happened to have installed. I opened it, but no parking shows up nearby, and the parking code was not valid either. Turns out you have to have the Danish ParkLink app installed. Well of course! Also, pro tip, if you use Android, use ADB to dig out logs of these apps. I had to do it with EasyPark once because I told them the service was down, and they insisted otherwise. But the app logs showed that it in fact was unavailable for a period... Where is the dignity in these companies?