I am a long time user of F-Droid and never had any problems with it in the last 7 or so years. However I came across a problem I can not seem to debug myself as I do not know any Android Development. When I update my apps via F-Droid most of them do the job just fine but there seem to be always around 10-20% of my apps that are unwilling to update. Right now we speak about “Barcode Scanner”, “Delta Chat”, “Ghost Commander” and “Keepass DX”. All my other apps “Syncthing”, “AnySoftKeyboard”, “DAVx5” to name a few are up to day and did not bug out.
Trying to find the source of the problem I started a manual update (clicking on “Update” in the app view of F-Droid. It seems to download the apk and flashes me the “Do you want to install” screen. But after clicking on “Install” the progress bar is shown for a split second and returns to a error message “Failed to install due to an unknown error”.
I run F-Droid 1.5.1 on a Alcatel OneTouch Idol 3 (6039Y) with Android 6.0.1. Unfortunately I do not know how to aquire any logs from F-Droid so I would need some hint from somebody who does. However I hope you can help me with this as it is quite frustrating having a few apps that refuse to update.