Need to re-enter Adobe password on each start?

I'm using Acrobat Reader DC and am logged in to my Adobe Account - on each single start of the app (also when doing so by opening a PDF file), I am requested to re-enter my password, and cannot even close the window requesting me to do so. Is there any setting I miss, to store the password permanently?

Architecture: x86_64

Build: 20.9.20074.389258

AGM: 4.30.101

CoolType: 5.14.5

JP2K: 1.2.2.46033

Thank you

Christian