Hue Sync box after deleting, cannot add it anymore?

I have recently moved to a new house, with a new wifi network. Had some troubles getting all my devices working, most of them are running again now.

My Hue Sync box has been reconnected to the new wifi and to the same Hue bridge (I think).
However, I am having troubles adding the Hue Sync box after deleting it from Homey. Simply said, Homey won’t find nor add it…

I tried rebooting the Hue app, rebooting Homey, even removing the Hue app and reinstalling it, nothing seems to help. Does anyone know how to solve this?