WordPress 5.4 and Enfold 4.7.4 – Error with Customizer

Hi,

i will get the following Error when opening the Customizer:

Uncaught Error: Call to undefined function gutenberg_can_edit_post_type() in /html/wordpress/wp-content/themes/enfold/config-gutenberg/class-avia-gutenberg.php on line 563
can_use_block_editor()
wp-content/themes/enfold/config-gutenberg/class-avia-gutenberg.php:423
init_force_classic_post_types()
wp-content/themes/enfold/config-gutenberg/class-avia-gutenberg.php:458
get_force_classic_post_types()
wp-content/themes/enfold/config-gutenberg/class-avia-gutenberg.php:533
force_classic_editor()
wp-content/themes/enfold/config-gutenberg/class-avia-gutenberg.php:661
handler_display_post_states()
wp-includes/class-wp-hook.php:287
apply_filters()
wp-includes/plugin.php:206
apply_filters()
wp-admin/includes/template.php:2170
get_post_states()
wp-includes/nav-menu.php:823
wp_setup_nav_menu_item()
array_map()
wp-includes/nav-menu.php:749
wp_get_nav_menu_items()
wp-includes/class-wp-customize-nav-menus.php:734
customize_register()
wp-includes/class-wp-hook.php:287
apply_filters()
wp-includes/class-wp-hook.php:311
do_action()
wp-includes/plugin.php:478
do_action()
wp-includes/class-wp-customize-manager.php:928
wp_loaded()
wp-includes/class-wp-hook.php:287
apply_filters()
wp-includes/class-wp-hook.php:311
do_action()
wp-includes/plugin.php:478
do_action()
wp-settings.php:562
require_once()
wp-config.php:123
require_once()
wp-load.php:37
require_once()
wp-admin/admin.php:34
require_once()
wp-admin/customize.php:13