Here is the working solution from obdii365.com.
1. Log out User Center, log in with user name and password again, run software upgrade.
2. If not working, Go to Setting, uninstall DiagProgram, log in with user name and password again. Then run upgrade.
Do as following:
Click on Home menu, go to Settings->Apps->DiagProgram
Log in obdstar again. It should be fine.