Fatal error: Uncaught Error: Class "Composer\Installers\BaseInstaller" not found in /srv/www/cntait.org/www/site.tree/public/wp-content/plugins/simple-local-avatars/vendor/composer/installers/src/Composer/Installers/MantisBTInstaller.php:7 Stack trace: #0 {main} thrown in /srv/www/cntait.org/www/site.tree/public/wp-content/plugins/simple-local-avatars/vendor/composer/installers/src/Composer/Installers/MantisBTInstaller.php on line 7