Solve Xhorse Dolphin XP005 Error Code 70

Problem:

The new Xhorse Dolphin XP005 key cutting machine had error code 70. How to fix it?

Error: 70.
Found available firmware update incomplete.

Solution:

Update firmware.
If failed to update firmware via mobile phone, update it via Xhorse Upgrade kit.
Update firmware to 2.2.8.