Product Registration fails with "Serial number incorrect!"

[DazzWill]

System: window
Battery or AC: ac
Model: PRIME B450M-A II
Frequency of occurrence:
Reset OS:
Screenshot or video:
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Detailed description： I'm attempting to register my motherboard but I get Product Registration fails with "Serial number incorrect!"

[Blake_ASUS]

Hi there,
If you are registering through MyASUS, please kindly update the APP and driver and try again.
If you are using the website, please try again as well. Please share the screenshot with me if it still doesn't work.

Just in case, please refer to below link for how to find the serial number

How to find product Serial Number
Thank you.