TYPO3 Exception 1295479651¶

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The default action can not be determined for controller "Foo"¶

#1295479651: The default action can not be determined for controller "Foo". Please check TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin() in your ext_localconf.php.

This may happen if the third parameter to \TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin() is wrong.

Invalid:

\TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin(
    'Ext',
    'Foo',
    [FooController::class => ['show']],
    []
);

Valid:

\TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin(
    'Ext',
    'Foo',
    [FooController::class => 'show'],
    []
);