RT-AC66U B1 Fails to upgrade

[kadebi4161]

System: Router RT-AC66U B1
Battery or AC:
Model:
Frequency of occurrence:
Reset OS:
Screenshot or video:
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Detailed description Since yesterday the router is displaying a Yellow exclamation. But when I click to update it fails.
current Firmware Version:3.0.0.4.386_45934
New Version 3.0.0.4.386.45987
Would prefer not to manually update each one.

Any suggestion ?

[Blake_ASUS]

Hi there,
For router products, please use our email service to contact our local team for more information.
ASUS - Email UsThank you.