Fatal error: Uncaught Error: Class "AmpProject\AmpWP\ExtraThemeAndPluginHeaders" not found in /htdocs/wp-content/plugins/amp/includes/class-amp-theme-support.php:279
Stack trace:
#0 /htdocs/wp-content/plugins/amp/includes/options/class-amp-options-manager.php(79): AMP_Theme_Support::get_theme_support_args()
#1 /htdocs/wp-content/plugins/amp/includes/options/class-amp-options-manager.php(260): AMP_Options_Manager::get_options()
#2 /htdocs/wp-content/plugins/amp/includes/amp-helper-functions.php(344): AMP_Options_Manager::get_option('theme_support')
#3 /htdocs/wp-content/plugins/amp/src/MobileRedirection.php(67): amp_is_canonical()
#4 /htdocs/wp-content/plugins/amp/src/Infrastructure/ServiceBasedPlugin.php(426): AmpProject\AmpWP\MobileRedirection->register()
#5 /htdocs/wp-content/plugins/amp/src/Infrastructure/ServiceBasedPlugin.php(395): AmpProject\AmpWP\Infrastructure\ServiceBasedPlugin->maybe_register_service('mobile_redirect...', 'AmpProject\\AmpW...')
#6 /htdocs/wp-content/plugins/amp/src/Infrastructure/ServiceBasedPlugin.php(203): AmpProject\AmpWP\Infrastructure\ServiceBasedPlugin->schedule_potential_service_registration('mobile_redirect...', 'AmpProject\\AmpW...')
#7 /htdocs/wp-content/plugins/amp/src/Infrastructure/ServiceBasedPlugin.php(145): AmpProject\AmpWP\Infrastructure\ServiceBasedPlugin->register_services()
#8 /htdocs/wp-content/plugins/amp/includes/amp-helper-functions.php(78): AmpProject\AmpWP\Infrastructure\ServiceBasedPlugin->register()
#9 /htdocs/wp-includes/class-wp-hook.php(324): amp_bootstrap_plugin('')
#10 /htdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array)
#11 /htdocs/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#12 /htdocs/wp-settings.php(578): do_action('plugins_loaded')
#13 /htdocs/wp-config.php(82): require_once('/htdocs/wp-sett...')
#14 /htdocs/wp-load.php(50): require_once('/htdocs/wp-conf...')
#15 /htdocs/wp-blog-header.php(13): require_once('/htdocs/wp-load...')
#16 /htdocs/index.php(17): require('/htdocs/wp-blog...')
#17 {main}
thrown in /htdocs/wp-content/plugins/amp/includes/class-amp-theme-support.php on line 279