If you are suddenly unable to open your database, please try the steps below to resolve the issue:
Make sure you're entering the correct master password! (I've forgotten my password.)
Restart your device.
Remove the database from Strongbox and re-add it (making sure to create a backup before you do so).
If you have another device, try opening the database on that device.
If you're storing the device with a cloud storage provider, try making a local copy and then unlocking that local copy with the Strongbox app.
If you're able to unlock a local copy of the database or to unlock it on another device, that's usually a sign that there's an issue with syncing with your cloud storage provider.
If you're still having problems, please send us an email at support@strongboxsafe.com.