Good afternoon everyone,
We've been seeing a number of reports that the recent update to 1Password 6.5.3 for iOS has made it impossible for some of you to enter your Master Password on the lock screen.
If you are experiencing this problem, please update to iOS 10.2.1 (or newer)
To update your iOS software open the Settings app and then tap on General > Software Update.
If you run into any trouble please don't hesitate to follow up with us in a new thread.