Fatal error: Uncaught Error: Call to a member function prepare_assets() on null in /homepages/34/d872064777/htdocs/waagschale_web/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-twenty-seventeen-compatibility.php:62 Stack trace: #0 /homepages/34/d872064777/htdocs/waagschale_web/wp-includes/class-wp-hook.php(292): UAGB_Twenty_Seventeen_Compatibility->generate_stylesheet(Object(WP)) #1 /homepages/34/d872064777/htdocs/waagschale_web/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters(NULL, Array) #2 /homepages/34/d872064777/htdocs/waagschale_web/wp-includes/plugin.php(551): WP_Hook->do_action(Array) #3 /homepages/34/d872064777/htdocs/waagschale_web/wp-includes/class-wp.php(763): do_action_ref_array('wp', Array) #4 /homepages/34/d872064777/htdocs/waagschale_web/wp-includes/functions.php(1291): WP->main('') #5 /homepages/34/d872064777/htdocs/waagschale_web/wp-blog-header.php(16): wp() #6 /homepages/34/d872064777/htdocs/waagschale_web/index.php(17): require('/homepages/34/d...') #7 {main} thrown in /homepages/34/d872064777/htdocs/waagschale_web/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-twenty-seventeen-compatibility.php on line 62