Fatal error: Uncaught Error: Class "Composer\Installers\Test\TestCase" not found in /srv/www/cntait.org/www/site.tree/public/wp-content/plugins/wp-nested-pages/vendor/composer/installers/tests/Composer/Installers/Test/InstallerTest.php:11 Stack trace: #0 {main} thrown in /srv/www/cntait.org/www/site.tree/public/wp-content/plugins/wp-nested-pages/vendor/composer/installers/tests/Composer/Installers/Test/InstallerTest.php on line 11