error – MooTools is not defined-Collection of common programming errors

You embed several jquery libraries, it’s not recommended and not necessary. It looks like you disable mootools in joomla (with a plugin or in your php code) and add it manually in your code. You may remove this lines, enable mootools again, disable all embeds of jquery libraries from plug-ins, and just use the last version. If you need old function from jquery (for example “live” method wich is deprecated now) you can use the jquery migrate plugin. then the scripts embedded in your header should look like this :

 
  
  
  
  

  ...

  
  
  
  jQuery.noConflict();