Fatal error: Uncaught Error: Call to undefined function MBBlocks\mb_merge_meta_box_with_blocks() in /var/www/vhosts/dbu.de/httpdocs/web/app/plugins/meta-box-aio/vendor/meta-box/mb-blocks/src/Block.php:20 Stack trace: #0 /var/www/vhosts/dbu.de/httpdocs/web/app/plugins/meta-box/inc/meta-box.php(50): MBBlocks\Block::normalize() #1 /var/www/vhosts/dbu.de/httpdocs/web/app/plugins/meta-box/inc/meta-box-registry.php(19): RW_Meta_Box->__construct() #2 /var/www/vhosts/dbu.de/httpdocs/web/app/plugins/meta-box/inc/core.php(32): RWMB_Meta_Box_Registry->make() #3 /var/www/vhosts/dbu.de/httpdocs/web/wp/wp-includes/class-wp-hook.php(324): RWMB_Core->register_meta_boxes() #4 /var/www/vhosts/dbu.de/httpdocs/web/wp/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #5 /var/www/vhosts/dbu.de/httpdocs/web/wp/wp-includes/plugin.php(517): WP_Hook->do_action() #6 /var/www/vhosts/dbu.de/httpdocs/web/wp/wp-settings.php(695): do_action() #7 /var/www/vhosts/dbu.de/httpdocs/web/wp-config.php(9): require_once('...') #8 /var/www/vhosts/dbu.de/httpdocs/web/wp/wp-load.php(55): require_once('...') #9 /var/www/vhosts/dbu.de/httpdocs/web/wp/wp-blog-header.php(13): require_once('...') #10 /var/www/vhosts/dbu.de/httpdocs/web/index.php(6): require('...') #11 {main} thrown in /var/www/vhosts/dbu.de/httpdocs/web/app/plugins/meta-box-aio/vendor/meta-box/mb-blocks/src/Block.php on line 20