I turned on unknown source installations, downloaded Confluence 1.71.13 apk via browser. When the download finished I tapped on the notification to sideload it. A message popped up saying:
No app found to open .apk file
Why did that happen? I can install it via App Manager, but I don't understand why this happens. Googling the error doesn't yield any useful info.
My Android version is 5.1.1.