Title: Error 28 Last modified: March 22, 2020 --- # Error 28 * [Le dahu](https://wordpress.org/support/users/dahuconcept/) * (@dahuconcept) * [6 years, 2 months ago](https://wordpress.org/support/topic/error-28-4/) * Fatal error: Uncaught Error: Call to undefined function pwp_get_amp_slug() in/ home/dahuconc/www/wp-content/plugins/progressive-wp/3rdparty-support/amp.php: 28 Stack trace: #0 /home/dahuconc/www/wp-includes/class-wp-hook.php(288): {closure}(‘ [https://dahu-co…’](https://dahu-co…’);) #1 /home/dahuconc/www/wp-includes/ plugin.php(206): WP_Hook->apply_filters(‘[https://dahu-co…’](https://dahu-co…’);, Array) #2 /home/dahuconc/www/wp-content/plugins/progressive-wp/Classes/class- amp.php(32): apply_filters(‘pwp_get_ampurl_…’, ‘[https://dahu-co…’](https://dahu-co…’);)# 3 /home/dahuconc/www/wp-includes/class-wp-hook.php(288): nicomartin\ProgressiveWordPress\ AMP->amp_start_url(Array) #4 /home/dahuconc/www/wp-includes/plugin.php(206): WP_Hook->apply_filters(Array, Array) #5 /home/dahuconc/www/wp-content/plugins/ pwa/wp-includes/class-wp-web-app-manifest.php(155): apply_filters(‘web_app_manifes…’, Array) #6 /home/dahuconc/www/wp-content/plugins/pwa/wp-includes/class-wp-web- app-manifest.php(62): WP_Web_App_Manifest->get_manifest() #7 /home/dahuconc/www/ wp-includes/class-wp-hook.php(288): WP_We in /home/dahuconc/www/wp-content/plugins/ progressive-wp/3rdparty-support/amp.php on line 28 Une erreur critique est survenue sur votre site. * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-28-4%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ The topic ‘Error 28’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/progressive-wp_8bd9c3.svg) * [Progressive WordPress (PWA)](https://wordpress.org/plugins/progressive-wp/) * [Frequently Asked Questions](https://wordpress.org/plugins/progressive-wp/#faq) * [Support Threads](https://wordpress.org/support/plugin/progressive-wp/) * [Active Topics](https://wordpress.org/support/plugin/progressive-wp/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/progressive-wp/unresolved/) * [Reviews](https://wordpress.org/support/plugin/progressive-wp/reviews/) * 0 replies * 1 participant * Last reply from: [Le dahu](https://wordpress.org/support/users/dahuconcept/) * Last activity: [6 years, 2 months ago](https://wordpress.org/support/topic/error-28-4/) * Status: not resolved