Why apps are not installing after downloading from f-droid app?

Error installing F-Droid

Device?

Android version?

Tried 1.19.0-alpha 3 yet? https://f-droid.org/repo/org.fdroid.fdroid_1019003.apk

Problem solved. You have to change 'Keep cached apps ’ to forever in settings.

why?

also, set autoupdates so your index is up to date

No need to keep cached apps forever.