Security problems persist - even after buying a new router.

I am having problems with my security being flagged as weak and insecure on my Mac.

Because of this I have now bought a new router which is TP-Link mobile Wi-Fi M7350.

This router works well on my iPad and also Windows computer. However I cannot access the Admin on the Mac although it does connect to the Internet without any problems. The Mac computer, iPad and Windows all flag this is being insecure. I think this is the reason why I cannot open it on the Mac, as Apple blocks sites deemed to be insecure.

The security is set to WPA-PSK/WPA2-PSK AUTO, or it shows “secured". I attach a screenshot.

I am very worried about this.

Can someone advise me please.

LC.