I was using signal Android app for a while. But few months ago, when I reinstalled the app and was trying to backup. It said, "Backup files are malfunction." I don't know what does that mean actually. So I installed few GitHub repo into my computer and after spending an hour I finally found one repo which actually worked. I got my backup as HTML files and media as .backup files. But I still cannot install the app on my android phone. I don't know what to do to fix that. HELP