The extender has the same SSID with the router or a different SSID? Suggest to use different SSID Also test the router wifi is stable or not check the firmware version and hardware, update to the...

Good sharing~ looks like it is proxy mode http://www.tp-link.com/en/faq-927.html

got it

kelomo wrote Update: My problem is just solved. It was password issue. My ISP has changed password without informing me. I got new password and installed without any problem. Glad to hear your...

Anton L.Z. wrote nothing to do with the Krack attack. Unstable connection on the router. Suggest to check the firmware and hardware, update to the latest firmware. Test when only one device connect...

Suggest to set the different SSID on the extender wit the the router