Question: I previously posted [here](https://unix.stackexchange.com/questions/651340/debian-installer-no-network-hardware-detected-gigabyte-b550-itx) seeking advice on how to get Debian installed on my PC. I managed to get the debian 11 (testing) installer to recognize the intel wireless adapter using a secondary USB drive with non-free firmware, but now I've run into another problem.

I'm getting this error message after using my network passphrase: "Failure of key exchange and association" Does anyone have an explanation/fix for this error? The network/passphrase works on every other device I own.

Answer: 
Select `Enter ESSID manually` from the list and enter the name of your wifi.

I was able to work around the problem by entering my ESSID manually, though it is listed after the installer scanned for available ESSIDs.
I had to disable the 5 GHz frequency band in my access point. Although my Intel wireless chip is capable of 5 GHz. SSIDs were found but key exchange failed before the change.