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    I have installed dashboard, but when opening it with browser, an Internal Server Error (500) occurred. I checked the log file of Apache, there is an error message as follows:

[Sun Jul 10 07:44:28.433012 2016] [core:error] [pid 4238:tid 139857850443520] [client 192.168.6.1:40412] End of script output before headers: django.wsgi

I have no idea about how to deal with the problem. Thanks.