I have installed cron_email addon but get this error message in the template
Error
The following tag has a syntax error:
{exp:cron}
Please correct the syntax in your template.
What is wrong?
As specified on the Cron Send Email page, "Requirements: ExpressionEngine Cron plugin". So make sure it is installed as well: http://expressionengine.com/downloads/details/expressionengine_cron