Default [Q] Wifi not working after JMZ kernel flash

I decided to flash JMZ's kernel and forgot to do a backup first...
Upon reboot none of the features work and wifi won't turn on.
Wiped the entire phone and wifi still refuses to turn on.

I noticed a previous thread says to flash boot.img in order for it to work but I get the following error when using fastboot to do it:
FAILED (remote: not allowed).

Can anyone help?