Shelly Button 1 Pending connection

[MaGa]

Hi all, I am trying to use a Shelly Button 1 to steer my Shelly dimmer. I've successfully added the dimmer and it works with the app. I've added the Shelly Button 1 to the app, successfully via "AP scan" and it appears in my devices. It's powered on (connected to a charger) and blinking blue. In the app it says "Pending Connection" and I've tried a few resents, always ending with the same result. Googling only leads me to old posts asking me to go to Shelly's web interface via 192.68.33.1 which is deprecated. Help needed: How do I connect this Button to my Dimmer after I connected to it via the app and see both the dimmer and the button but the button says 'connect pending'? any help is greatly appreciated.