Fatal error: Uncaught Error: Class "Zikula\ExtensionsModule\Installer\AbstractExtensionInstaller" not found in /home/dwtechco/public_html/src/extensions/zikula/oauth-module/OAuthModuleInstaller.php:19 Stack trace: #0 {main} thrown in /home/dwtechco/public_html/src/extensions/zikula/oauth-module/OAuthModuleInstaller.php on line 19