Please note that, when unlocking Tapplock one+, do not pull or put any tension on the shackle until you receive the green LED, or it can get stuck in the locked position. You can find the tutorial video in the Setting menu of the Tapplock App demonstrating the correct way of unlocking.
If you are still experiencing issues, hold the lock with one hand and hit it against your other hand. Use fingerprint mode to unlock and pull on the shackle as the LED turns green.
If you are still having issues getting your Tapplock one+ to open, please submit a support request.