It is quite funny that I got the solution myself.... The problem is that MIMO app does not work with some languages. So to fix it change the language of your iPhone to English it will work and allow to register your device then whenupdated the firmware you can come back to your language

sorry for the crash.

Plz  set iphone language to : Chinese, English,Korean, Japanese, German, French
https://support.apple.com/zh-cn/HT204031

We figure out this bug, and will fix this in the next app version.

Hello and good day. Thank you for sharing your experience in registering the DJI Osmo Pocket. If you have any other concerns or inquiries with your DJI Osmo Pocket or with DJI. Please feel free to post it here at DJI Forum. We are here to help you. Happy holidays.

Great thanks!