HI, IAfter following the OpenStack liberty Install guide, i'm now in the step of trying to access the dashboard for the first time but every time i try to access horizon this message : The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator at webmaster@localhost to inform them of the time this error occurred, and the actions you performed just before this error. More information about this error may be available in the server error log.

in the log file : /var/log/apache2/error.log i have this msg error : [Wed Apr 27 09:11:58.386424 2016] [core:error] [pid 7552:tid 140620400137984] [client 10.0.0.11:37160] End of script output before headers: django.wsgi

can you help me !!!!