When i try to edit my posts in the joomla frontend i get the following error:

Uncaught ReferenceError: Joomla is not defined

I can open the posts editor in the frontend, change the content and when i want to save it i get another error:

Uncaught ReferenceError: Joomla is not defined at HTMLButtonElement.onclick

How can i solve this problem? Looks like a script or something is missing. Im using Joomla Version 3.6.4, use a frontend built from scratch and my admin template is isis.

1 Answer 1


There can be javascript cache problems.
Clear your browser/Joomla! cache first:
If that won't help simply reinstall Joomla! Keep in mind that all your CSS changes will override during reinstallation.

  • Thx for your help. I clearad all the cache. Nothing changed. I think also a joomla reinstall will not change this. Someone told me it could be that mootools ins not loaded. Now i try to load mootools with joomla. I added "('behavior.framework')" and also installed a plugin to load mootools. Actually its doing nothing (not loading mootools). Going crazy about this...
    – public9nf
    Nov 9, 2016 at 10:16
  • As for mootols plugin, have you tried: plg_j25_legacy.zip plugin?
    – micjan
    Nov 9, 2016 at 10:20

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