1. Turn off the phone and restart it, and then try to open the photo album.
2. Restore the phone to the factory settings, as follows: First, click "Settings" on the phone desktop. Then select the "Other Settings" option. Then open "Recover Mobile Phone" to enter. Finally, click "Restore System Settings".
None of the above methods can solve the problem. You can take your mobile phone and warranty card to the OPPO mobile phone repair center in official website for inspection and repair.