Matomo encountered an error: Uncaught Exception: Piwik and/or some plugins have been upgraded to a new version. --> Please run the update process first. See documentation: https://matomo.org/docs/update/ in /data/websites/stats.simplement-web.com/plugins/CoreUpdater/CoreUpdater.php:67 Stack trace: #0 [internal function]: Piwik\Plugins\CoreUpdater\CoreUpdater->dispatch() #1 /data/websites/stats.simplement-web.com/core/EventDispatcher.php(141): call_user_func_array() #2 /data/websites/stats.simplement-web.com/core/Piwik.php(809): Piwik\EventDispatcher->postEvent() #3 /data/websites/stats.simplement-web.com/core/FrontController.php(375): Piwik\Piwik::postEvent() #4 /data/websites/nat.fam-martel.eu/wp-content/plugins/wp-piwik/classes/WP_Piwik/Request/Php.php(40): Piwik\FrontController->init() #5 /data/websites/nat.fam-martel.eu/wp-content/plugins/wp-piwik/classes/WP_Piwik/Request/Php.php(18): WP_Piwik\Request\Php->call() #6 /data/websites/nat.fam-martel.eu/wp-content/plugins/wp-piwik/classes/WP_Piwik/Request.php(63): WP_Piwik\Request\Php- (which lead to: Session must be started before any output has been sent to the browser; output started in /data/websites/nat.fam-martel.eu/wp-includes/class.wp-styles.php/350)