@James_n 

Hello,

Basically, you will be required to create a password when you initially set up the router, you may confirm again with the password you created. BTW, Have you referred to this troubleshooting guide if you cannot log into its web UI?
What should I do if I can’t log into web-based interface of my TP-Link device?

Meanwhile, please show me the hardware version and firmware version of your C60 and the screenshot when you failed to login after type in the correct username and password.

Good day.

@Kevin_Z 

WHen I enter the web page using the browser, I get a prompt oly to enter the password. no place to enter the user ID. Even though I provided the correct admin password, I Am getting message as incorrect login.

- james

@James_n Facing the same issue. The password i use to login on app doesnot work on webpage. And it simply says logon failure. I have been trying to get login for changing channel of my wifi band but so for unable to access at all.  

P. S I have already hard resetted the Archer C60 twice. 

@James_n are you having a TP-LINK registered ID bound to cloud? I went through the User Guide for C60 v3 firmware upgrade as I was facing the same thing. I found out that if we have a registered TP-LINK ID then we won't be able to log in via the router password. We need to log in via TP LINK ID.

C60 v3 User Guide ---- Page 16