Can't connect to WiFi using Nougat

Question

I updated to Nougat on my Nexus 5X. Can't seem to connect to some WiFi networks, as the connect button stays greyed out after entering credentials. What could be wrong?

— Arnfinn | Sources

Answer

It turns out that you should select at least one option in the "CA Certificate" field. I was able to save the setting after I set it to "Don't validate".

— akarthik10 | Sources

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