I and using 1pw in my mobile since may months
Today when i required it, i show it was uninstalled automatically somedays back. I don't remember uninstalling it.
Anyway, i re-installed but now when i am trying to connect with dropbox it gives dropbox error as this app is not valid. Screenshots at below link
I was using 1pw in same mobile earlier.
1Password Version: latest android
Extension Version: Not Provided
OS Version: Android 6.0.1
Sync Type: dropbox
Referrer: forum-search:dropbox error