Error message

• User warning: The following module is missing from the file system: google_analytics_reports. For information about how to fix this, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1156 of /customers/6/5/a/sannygas.be/httpd.www/includes/bootstrap.inc).
• User warning: The following module is missing from the file system: popup_nodereference. For information about how to fix this, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1156 of /customers/6/5/a/sannygas.be/httpd.www/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /customers/6/5/a/sannygas.be/httpd.www/includes/common.inc:2820) in drupal_send_headers() (line 1501 of /customers/6/5/a/sannygas.be/httpd.www/includes/bootstrap.inc).
• Error: Call to undefined method Composer\Autoload\ClassLoader::setClassMapAuthoritative() in ComposerAutoloaderInit521321008fc462c9f6b48808ceb7ed29::getLoader() (line 38 of /customers/6/5/a/sannygas.be/httpd.www/sites/all/modules/automatic_updates/vendor/composer/autoload_real.php).