I have run into the problem discussed last year where an app finishes downloading but fails to install citing, "Unknown Error Code: -505." The problem was supposedly fixed in Lolipop 5.0.1. My Android device uses the even newer version 5.1. So the error persists.

I should add that the problem only arises after a successful installation that I uninstall and then attempt to reinstall---which I sometimes do for various reasons.

Most recently this incident has occurred with the Guardian Project app "Orbot". However, its sister app, the browser " Orweb", reinstalled just fine.

Finally, sometimes an app will reinstall after multiple attempts. "Orbot" has not been one of them.

How do I get this error to go away?

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.