Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "create_post_type" not found or invalid function name in /var/www/vhosts/ugaatbouwen.com/httpdocs/wp-includes/class-wp-hook.php:324
Stack trace:
#0 /var/www/vhosts/ugaatbouwen.com/httpdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()
#1 /var/www/vhosts/ugaatbouwen.com/httpdocs/wp-includes/plugin.php(517): WP_Hook->do_action()
#2 /var/www/vhosts/ugaatbouwen.com/httpdocs/wp-settings.php(643): do_action()
#3 /var/www/vhosts/ugaatbouwen.com/httpdocs/wp-config.php(108): require_once('...')
#4 /var/www/vhosts/ugaatbouwen.com/httpdocs/wp-load.php(50): require_once('...')
#5 /var/www/vhosts/ugaatbouwen.com/httpdocs/wp-blog-header.php(13): require_once('...')
#6 /var/www/vhosts/ugaatbouwen.com/httpdocs/index.php(20): require('...')
#7 {main}
thrown in /var/www/vhosts/ugaatbouwen.com/httpdocs/wp-includes/class-wp-hook.php on line 324
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