Asus Router XT8 Registration Fail - Incorrect Serial Number

[wkapadia3]

System: Router
Battery or AC:
Model: XT
Frequency of occurrence:
Reset OS:
Screenshot or video:
========================
Detailed description：I am trying to register Asus Router XT8 with 2 nodes. With both serial numbers I am getting Serial number incorrect! error.

[GEEK_ASUS]

Hi @wkapadia3 ,
Please check your PM.
Thank you.

[marchelled]

Hi,
Please let me know how this was solved as I recently purchased the xt8 from Amazon and am unable to register it.
thanks

[GEEK_ASUS]

Hi @marchelled ,
Please check your PM.
Thank you.

[Blackbearwhite]

Hi, I am having the same issue with my XT8. Were you able to register the router? Thank you