Device: Sony Xperia Z1 C6903, System: CyanogenMod 12.1
I used DAVdroid on my device to synchronize contacts and calender with my gmx-account, which used to work quite well for a couple of months. Recently, DAVdroid had problems in synchronizing my contacts, without obvious reason (for me). Thus, I uninstalled DAVdroid. As I wanted to install it again via F-Droid, my system refused this: when clicking “Installieren”, a pop-up information says “nicht installiert” (not installed).
It would be great, if somebody could help me out!
I’m not a pro in this subject, so please imagine explaining this to your grandmom 
Many thanks and kind regards
Are you sure that you updated your F-Droid version too?
This seems to be an F-Droid problem, so maybe you will get help in their forums.
@Gruen – I had the same problem with cyngn on zuk z1; solved by clearing fdroid cache & data, then updating fdroid depositories. then reinstalling latest version of davdroid. hope this helps.
