.. include:: /Includes.rst.txt

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TYPO3 Exception 1228262000
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.. include:: /If-you-encounter-this-exception.rst.txt

$hookObject must implement interface `TYPO3\CMS\Backend\Toolbar\ClearCacheActionsHookInterface`
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- Try clearing the cache (via the Admin/Install Tool)
- If this happens with your own code, check that `$hookObject` implements the required interface