TYPO3 Exception 1404068038¶
Note
Below, the TYPO3 community may have provided additional information or solutions for this exception. However, these may or may not apply to your particular case. If you can provide more information, you should come back here and add your experience and solution steps to this issue once you have resolved it.
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No extension key could be determined when calling addPlugin()¶
You will see this exception most likely because
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPlugin() is used
in a ext_tables.php file, which will not work. As described in the API
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPlugin() is
meant to be called from ext_tables.php or (as of TYPO3 6.2.4 or later) in a file
in Configuration/TCA/Overrides/tt_content.php. Calling it from any other
place e.g. ext_localconf.php does not work and is not supported
If you call it from Configuration/TCA/Overrides/tt_content.php, the
extension key needs to be specified as third parameter.