Hi. I just installed Nagios Core Version 4.0.5 on CentOS 6.6 (final) with ISPConfig 3.0.5.4, everything went perfectly, accessing the domain / nagios asks login and password, normal access out, what happens is that when I try to configure anything, access any internal link nagios, it shows the error: ERROR 500 - Internal Server Error! The Following error occurred: The requested URL Caused an internal server error. If you get this message repeatedly please contact the webmaster. Powered by ISPConfig Please, someone knows why the internal pages of the Nagios not have access, how can I fix this problem. thanks