Hi,

Below is the instruction to setup parental control.

https://www.tp-link.com/support/faq/1531/ 

Please notice that the internet access time is not the time period when you can access internet, instead, the parental control rule will take effect during this time. 

For the whitelist, the devices can access the allowed websites only during the internet access time, vice versa. 

Besides, you can select 24/7 all days as internet access time, choose whitelist but no keywords. After that, please confirm whether you can access internet. 

Note: Theoretically, the internet won't work. 

Good day. 

@Nia 

Have you checked the System Time settings are correct on the Archer C60? If that is correct, please show us the Parental Control settings on your C60, we can then confirm, thanks.