Wireless connection disappeared

Have been receiving wireless connection flawlessly for months. Don’t have that access anymore.

Attempting to connect to university network with VPNClient i followed their instruction which included typing ‘sudo ./vpn_install.sh’ into terminal. I didn’t succeed. Trying to get online elsewhere to install through YaST I plugged in a USB internet device from mobile phone provider and got nowhere with that. On the same day my flatmate set up windows wireless network which was recognised but couldn’t connect.

Since then can’t connect to any wireless networks at all although network manager recognises them and attempts connect.

Haven’t otherwise been messing with settings and appreciate some help greatly.