Error in blocking any client
I'm unable to block any other device as i have attached the screenshot of the the error appearing every single time
TP-LINK Archer C20
Firmware Version:0.9.1 3.16 v0001.0 Build 161130 Rel.68411n
Hardware Version:Archer C20 v4 00000004
Antenna
External Integrated
Built-in Devices
Antenna
Cables Included
Network Cable
Color
Black
Compliant Standards
FCC, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n
General
Connectivity Technology
Wired Connectivity, Wireless Connectivity
Data Link Protocol
Ethernet, Fast Ethernet, IEEE 802.11b
Data Transfer Rate
733 MBps
Depth
144.8 mm
Device Type
Wireless Router
Features
Dual Band, Firewall Protection, IPv6 Compatible, Stateful Packet Inspection (SPI), Wi-fi-protected Setup (WPS)
Max Operating Temperature
40°C max
Min Operating Temperature
0°C min
Network Transport Protocol
DDNS, IPsec, L2TP, PPTP
Power Device
External Power Adapter
Software Included
Drivers & Utilities
Width
231.1 mm wide
Wireless Speed Rating
AC750
Wireless Standard
Wireless-AC, Wireless-G, Wireless-N
Connectivity
Wireless
Encryption Type
WEP, WPA, WPA2