The cookie consent code in 'cookie_consent.php' has an incorrect requires capability that states the user must have course update capability. This is incorrect, all users must be able to set consent.

The solution is to remove the requires_consent line of:

require_capability('moodle/course:update', $coursecontext);

Issue noticed by 'Neill Magill' on http://moodle.org/mod/forum/discuss.php?d=201582#p889334