Error 30H

Hi everyone newbie here, I received my brand new electric bike from China on Wednesday. The problem I have encountered. The display screen on the sabvoton controller is very faint, and is showing a 30H error. The bike is not working at all. Any suggestions would be welcome,
Thanks Charly.

Maybe one of these will help?
https://endless-sphere.com/forums/search.php?keywords=sabvoton+30h&terms=all&author=&sc=1&sf=all&sr=posts&sk=t&sd=d&st=0&ch=300&t=0&submit=Search