In a terminal window (Ctrl-Alt-t) enter: sudo lshw
and your password when asked.
Search the output for:
*-network
description: Wireless interface
Write down on paper the logical name, and the serial number (six double digits, separated by colons).
On your task bar, select the network Edit connections. Enter your wireless connection name. For ssid: re-enter the connection name. For Mode: enter client. For BSSID: leave it blank. For Device: enter the logical name you copied down from the network description. For Cloned MAC address: enter the six double digits, separated by colons you wrote down.
For MTU: select automatic.
On the Security page, select WPA & WPA2 Personal. Enter your wireless connection password. For IPv4: select Automatic (DHCP). For IPv6: select Automatic. Save the connection definition.
In the terminal window, enter: systemctl restart NetworkManager
Hopefully your network should now be working.