This error occurs because Jamroom cannot verify (for security reasons) that the template file that was requested is located in the correct directory. Most of the time this occurs because Jamroom is unable to correctly identify the REAL PATH to your jamroom/templates directory. This is usually fixed by modifying the jamroom/config/settings.cfg.php file and making sure the “jamroom_path” and “jamroom_url” settings are set correctly for your system:

#-----------------------------------------------------------------------
# PATH SETTINGS
#-----------------------------------------------------------------------
# Jamroom will try to auto-detect the path that it's scripts are running
# in, but on some servers this may not work 100% of the time.  Leave
# this at the default unless Jamroom tells you to change it.  Default is
# "detect" - any other value and Jamroom will attempt to use it as the
# ABSOLUTE path to the jamroom scripts.  Note that this must be the
# absolute path - i.e. /full/path/to/jamroom (note no trailing slash)
$config['jamroom_path'] = 'detect';
 
# if the $config['jamroom_path'] setting has been set to something OTHER
# then detect you must enter the URL for Jamroom here as well so Jamroom
# knows how to resolve relative URLS within its scripts.  Leave this at
# the default "detect" unless you have modifed the value above this one.
# if you do need to put an entry in, put it in like so:
# http://path/to/jamroom - note there is no trailing slash "/".
$config['jamroom_url'] = 'detect';

You want to change the “detect” to the actual FULL PATH (for jamroom_path) and URL for your jamroom install. For example:

$config['jamroom_path'] = '/home/username/public_html/jamroom';
$config['jamroom_url'] = 'http://www.example.com/jamroom';

Make sure you include the single quotes around the entries.