Viewing an answer of a student in an autoevaluation of a lesson or unit , and clicking to comment the answer he selects ("Make comment or override mark" link)(url: http://www.mydomain.com/mod/quiz/review.php?attempt=10084) , appears a new popup windows (url : http://www.mydomain.com/mod/quiz/comment.php?attempt=10084&slot=1), where you could write the comment, but it shows a blank page saying "[MAIN CONTENT GOES HERE - Nu0nMi0D7F]".

Moodle version:
$plugin->version = 2013100800; // YYYYMMDD.
$plugin->maturity = MATURITY_STABLE; // this version's maturity level.
$plugin->release = '2.6 (Build: 20131008)';
$plugin->requires = 2013051401; // Requires Moodle 2.5.1.
$plugin->component = 'theme_essential';
$plugin->dependencies = array(
'theme_bootstrapbase' => 2013050100,
);

Essential Theme version:
$plugin->version = 2013100800; // YYYYMMDD.
$plugin->maturity = MATURITY_STABLE; // this version's maturity level.
$plugin->release = '2.6 (Build: 20131008)';
$plugin->requires = 2013051401; // Requires Moodle 2.5.1.
$plugin->component = 'theme_essential';
$plugin->dependencies = array(
'theme_bootstrapbase' => 2013050100,
);