WiFi, deauthenticating by local choice (reason=3)

OS: Debian 9.2.1 amd64

driver=rtl8192cu driverversion=4.9.0-4-amd64

/var/log/kern.log:

wlan0: aborting authentication with xx:xx:xx:xx:xx:xx by local choice (Reason: 3=DEAUTH_LEAVING)

Cause (in my case): REGDOMAIN variable in /etc/default/crda

Fix:

iw reg set NO
sed -i 's/^REG.*=$/&NO/' /etc/default/crda
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