No More Still

Fatal error: Uncaught Error: Call to undefined method WP_HTML_Tag_Processor::class_list() in /srv/users/serverpilot/apps/stillnomore/public/wp-content/plugins/jetpack-boost/jetpack_vendor/automattic/jetpack-image-cdn/src/class-image-cdn.php:483 Stack trace: #0 /srv/users/serverpilot/apps/stillnomore/public/wp-includes/class-wp-hook.php(310): Automattic\Jetpack\Image_CDN\Image_CDN::filter_the_content('<p>As Father&#8...') #1 /srv/users/serverpilot/apps/stillnomore/public/wp-includes/plugin.php(205): WP_Hook->apply_filters('<p>As Father&#8...', Array) #2 /srv/users/serverpilot/apps/stillnomore/public/wp-includes/formatting.php(3980): apply_filters('the_content', 'As Father's Day...') #3 /srv/users/serverpilot/apps/stillnomore/public/wp-includes/class-wp-hook.php(310): wp_trim_excerpt('As Father's Day...', Object(WP_Post)) #4 /srv/users/serverpilot/apps/stillnomore/public/wp-includes/plugin.php(205): WP_Hook->apply_filters('', Array) #5 /srv/users/serverpilot/apps/stillnomore/public/wp-includes/post-template.php(434): apply_filters('get_the_excerpt', '', Object(WP_Post)) #6 /srv/users/serverpilot/apps/stillnomore/public/wp-includes/post-template.php(399): get_the_excerpt() #7 /srv/users/serverpilot/apps/stillnomore/public/wp-content/themes/generatepress/content.php(73): the_excerpt() #8 /srv/users/serverpilot/apps/stillnomore/public/wp-includes/template.php(787): require('/srv/users/serv...') #9 /srv/users/serverpilot/apps/stillnomore/public/wp-includes/template.php(720): load_template('/srv/users/serv...', false, Array) #10 /srv/users/serverpilot/apps/stillnomore/public/wp-includes/general-template.php(206): locate_template(Array, true, false, Array) #11 /srv/users/serverpilot/apps/stillnomore/public/wp-content/themes/generatepress/inc/theme-functions.php(564): get_template_part('content', '') #12 /srv/users/serverpilot/apps/stillnomore/public/wp-content/themes/generatepress/index.php(44): generate_do_template_part('index') #13 /srv/users/serverpilot/apps/stillnomore/public/wp-includes/template-loader.php(106): include('/srv/users/serv...') #14 /srv/users/serverpilot/apps/stillnomore/public/wp-blog-header.php(19): require_once('/srv/users/serv...') #15 /srv/users/serverpilot/apps/stillnomore/public/index.php(17): require('/srv/users/serv...') #16 {main} thrown in /srv/users/serverpilot/apps/stillnomore/public/wp-content/plugins/jetpack-boost/jetpack_vendor/automattic/jetpack-image-cdn/src/class-image-cdn.php on line 483