Cannot manage Apps from Garmin Express

Hi,

i am having problems managing my Fenix 3 (w/o HR) apps, either via Connect or Garmin Express. The Connect crashes completely, and the Garmin Express just opens a blank page on the app.

I need to register a watch face that i wanna buy and i cannot access it via any tool.

Any ideas on how to approach this?

Thanks in advance for the help.