Wifi no longer connecting
Since upgrading to the new El Capitan software, my MacBook Air is no longer connecting to my wifi. Other devices are connecting fine, and it only has been an issue after the upgrade. I have tried these solutions so far but have had no success:
1. Going to System Preferences, Network and then deleting the wifi connection and then reentering the details and trying to connect. It keeps telling me that my password is incorrect even though I am using the password from the router directly and all of my other devices are fine.
2. Restarting my laptop and then holding down option, and trying to connect to the connection through that. Again, it doesn't accept my password.
If anyone had any advice/has been experiencing the same thing, I'd really appreciate some feedback/support. Thank you in advance.
MacBook Air (13-inch Mid 2013), OS X El Capitan (10.11)