How to Fix Xhorse Dolphin XP005 Error Code 87

 Problem:

When turning on the Xhorse Dolphin XP005L key cutting machine it asks for an update. updated to 99% it says network error. the network is fine.
It cannot charge battery only via power supply and also displays error code 87. Any solution?

Solution:

Unplug this green cable on the battery, then run an update. Plug the green cable after the upgrade is finished.