OPPO R8 17 failed to verify the prompt signature of firmware upgrade package.
Your mobile phone can't be upgraded normally because of your root permission. I suggest you back up your phone first, then download the firmware again and put it in your phone. After entering the recovery, you can use it normally by brushing the latest firmware. If you can't brush the machine, you can also go to the local after-sales service, and the after-sales staff will handle it properly for you.