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+1 vote
I installed Headwind MDM, everything is fine but when I am clicking "QR code" icon in the "Configurations" section, it is not shown (I see a standard image placeholder)
by (230 points)

1 Answer

+1 vote
Best answer
Probable reason: The project URL is not accessible from the local machine.

Make the project URL accessible from the local machine.
If you're using iptables to redirect port 80 to 8080, redirect also for loopback interface:

# iptables -t nat -A OUTPUT -o lo -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 8080
by (2.2k points)
edited by
I am having the same Problem, but unfortunately this doesn't fix it for me. Are there any other reasons that could be responsible for that error?
Another reasons of QR code failure may be absence of aapt utility, lack of required Java libraries, etc. Please look into the Tomcat log /var/lib/tomcat8/logs/catalina.out for details.