New openwrt one wifi problems

I have a new openwrt one router that I can not connect to the wireless network by my computer and phone. Here are the details. This problem occurred with the original firmware and system. It still continued after I updated to the current firmware and system using the attendupdate app. The wifi network mode is set as follow:

The wireless network setting match with my old D-Link router settings, which worked fine with my computer and phone. The wired network of the openwrt one works fine. I also am able to connect to an openwrt travel router wireless network with out any problem. Any help you can give is greatly appreciated. Thanks.

best wishes.

Select network "lan"
this wifi is not connected anywhere
And never ever again disable WMM {or change any checkboxes you dont understand)

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I had set the 'lan' before without the 'WMM', since it was never enabled from the start, but the problem persisted. I have enabled WMM and 'lan'. now it the wireless connection works. Thanks.

No way, wmm is default and required since wifi4