@Nick50 Ok. So the main router's network also doesn't work properly while the RE450 is connected to it? Perhaps try to setup the RE450 again from the beginning. First reset the RE450 to factory...

@Sabbir19 Hi, TP-Link does not offer the channels that require support for DFS (Dynamic Frequency Selection) on their lower-priced router models like the Archer C64. These routers are limited to...

@eys There are a couple more factors that could potentially affect the Parental Controls as well. Check whether "Secure DNS" is activated in the web browser. In case it is, then switch it off and...

@Nick50 Ok. So, originally the RE450 showed up under wireless networks as "TP-Link_Extender". You connected a mobile device to "TP-Link_Extender" and used the Tether app to setup the RE450. After you...

@Nick50 Hi, As TP-Link currently offers approximately 30 different models of range extenders it would be helpful if you let us know which exact model (and also the hardware version, e.g. "Ver: 1.0,...

@eys Hi, Verify that the device you've blocked is currently still using the same MAC address that it used at the time when you added it to the Parental Controls.