Why am I unable to connect to certain WiFi networks? We have a UniFi WiFi access point at our office, which has both a 2.4 GHz and a 5 GHz network.

I am unable to connect to either network, even though I have no problem connecting to any other WiFi network and other devices can also connect just fine to the UniFi networks.

Why is this and how can I fix it?
To be able to connect to the UniFi networks you need to change your Wi-Fi frequency band from Automatic to either 5 GHz or 2.4 GHz.

As long as the mode is set to automatic, you will not be able to connect to either network. Why that is, is unclear to me. However other users reported similar problems.