Fatal error: Uncaught Error: Call to undefined function use_block_editor_for_post_type() in /www/htdocs/w0139a41/network-campus.de/wp-admin/includes/class-wp-screen.php:328 Stack trace: #0 /www/htdocs/w0139a41/network-campus.de/wp-admin/includes/template.php(2391): WP_Screen::get('twmembership') #1 /www/htdocs/w0139a41/network-campus.de/wp-admin/includes/template.php(1342): convert_to_screen('twmembership') #2 /www/htdocs/w0139a41/network-campus.de/wp-content/plugins/tw-membership/classes.php(556): remove_meta_box('commentstatusdi...', 'twmembership', 'normal') #3 /www/htdocs/w0139a41/network-campus.de/wp-content/plugins/tw-membership/classes.php(458): MemberWunder\Application->initPostType() #4 /www/htdocs/w0139a41/network-campus.de/wp-includes/class-wp-hook.php(286): MemberWunder\Application->init('') #5 /www/htdocs/w0139a41/network-campus.de/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #6 /www/htdocs/w0139a41/network-campus.de/wp-includes/plugin.php(465): WP_Hook->do_action(Array) #7 /www/htd in /www/htdocs/w0139a41/network-campus.de/wp-admin/includes/class-wp-screen.php on line 328