Uncaught Error: Class 'WP_REST_Block_Directory_Controller’ not found

Cześć! Przy próbie edycji strony pojawia mi się poniższy błąd. Jestem totalnie zielona w temace, dopiero zaczynam przygodę z WordPressem. Będę wdzięczna za pomoc i wskazanie jak to naprawić.

Fatal error: Uncaught Error: Class 'WP_REST_Block_Directory_Controller' not found in /home/platne/serwer147137/public_html/Strona/wp-includes/rest-api.php:333 Stack trace: #0 /home/platne/serwer147137/public_html/Strona/wp-includes/class-wp-hook.php(307): create_initial_rest_routes() #1 /home/platne/serwer147137/public_html/Strona/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters() #2 /home/platne/serwer147137/public_html/Strona/wp-includes/plugin.php(476): WP_Hook->do_action() #3 /home/platne/serwer147137/public_html/Strona/wp-includes/rest-api.php(561): do_action() #4 /home/platne/serwer147137/public_html/Strona/wp-includes/rest-api.php(519): rest_get_server() #5 /home/platne/serwer147137/public_html/Strona/wp-includes/rest-api.php(2868): rest_do_request() #6 [internal function]: rest_preload_api_request() #7 /home/platne/serwer147137/public_html/Strona/wp-includes/block-editor.php(601): array_reduce() #8 /home/platne/serwer147137/public_html/Strona/wp-admin/edit-form-blocks.php(75): block_editor_rest_api_prelo in /home/platne/serwer147137/public_html/Strona/wp-includes/rest-api.php on line 333

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