New PureFibre user and got RT-AC87U error

[NewTelusUser24]

As a new PureFiber user, I couldn't have internet access via WiFi for PC and ipad (hotspot worked). The error message was "RT-AC87U. Sign in with your ASUS router account". I came across a post that had a similar issue, but the solution was unclear? Could you please help new user to troubleshoot?
https://forum.telus.com/t5/Internet-Home-Phone/Cannot-connect-to-some-website-using-home-internet/m-...

[ichi730]

HI @NewTelusUser24 ,

Thanks for dropping by. To confirm, are you using an ASUS Router instead of TELUS Supplied equipment?

If yes, you might use this link on how to update the modem as per the error message you've posted 
1. https://www.asus.com/supportonly/rt-ac87u/helpdesk_bios/
2. https://www.asus.com/ca-en/support/faq/1005263/

Cheers!