ext_localconf.php

<?php

/*  | This extension is made with ❤ for TYPO3 CMS and is licensed
 *  | under GNU General Public License.
 *  |
 *  | (c) 2021 Armin Vieweg <info@v.ieweg.de>
 */
if (!defined('TYPO3_MODE')) {
    die('Access denied.');
}

$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_tcemain.php']['processDatamapClass']['file_canonical'] =
    \T3\FileCanonical\Hook\DataHandlerHook::class;