After downloading the android file, I click the file and it replies "can't open file"
It sounds like it may be an issue with your device's permissions, try checking to see if it allows apk files not from the app store to be installed, maybe a setting got flipped during a recent software update (happened to me before lmao).
If it's not that, you may need to do a full reinstall, unfortunately. We're looking into adding something that'll allow skipping Aris entirely to help counteract this, though.