This is a common issue and there are a number of possible issues that may lead to the user not being able to save or apply changes to their content via the Joomla front end editor.
The main issue we see with our Joomla templates is the use of the function in our framework that removes mootools from the output of the Joomla site.
The Joomla editor require mootools.js to load on the front end in order for the editor buttons to function properly. In Zen Grid framework templates you need to ensure that mootools is not disabled in the template parameters if you or your client requires the front end editing option.
1. Navigate to the Settings > Performance panel in the template admin
2. Ensure that the mootools setting is set to either no or add via framework.
