It's better to contact tp support for help directly.

WPA3 Wi-Fi protocol is just released. The manufacotors need some time to develop and test. Therefore, I think we may need to wait for long time to get accurate information from the product factory.

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Press the setting button for 10-15s to hard reset to factory default. Then, try to reconfigure them. https://www.tp-link.com/us/faq-946.html Good luck.

Generally speaking, some special characters and space can't be accepted. More description will be good for our cusomers. This is a good suggestion and I will email to tplink. Hope they will improve...

Firstly, make sure your modem's wifi is working properly. Try to change wireless channel of the modem WiFi. move it closer to your modem to configure it.