I use RPi 3 Model B, and I’m in trouble with its wifi connection. I’ve tried to connect to the internet via wifi but I can’t (I can connect the wired network.). As far as I know, I can connect via wifi without any additional adapters with this RPi b3, but I cannot, so I connected an adapter but still I cannot.
I see the two cross marks on the arrows indicating connection, and I cannot see the access point. Also, I cannot open the wireless and wired network setting window.
How can I solve this problem?