Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class "WC_Yourpay2_0" not found in /customers/f/c/4/hairbystella.dk/httpd.www/wp-includes/class-wp-hook.php:303 Stack trace: #0 /customers/f/c/4/hairbystella.dk/httpd.www/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array) #1 /customers/f/c/4/hairbystella.dk/httpd.www/wp-includes/plugin.php(470): WP_Hook->do_action(Array) #2 /customers/f/c/4/hairbystella.dk/httpd.www/wp-settings.php(578): do_action('init') #3 /customers/f/c/4/hairbystella.dk/httpd.www/wp-config.php(126): require_once('/customers/f/c/...') #4 /customers/f/c/4/hairbystella.dk/httpd.www/wp-load.php(50): require_once('/customers/f/c/...') #5 /customers/f/c/4/hairbystella.dk/httpd.www/wp-blog-header.php(13): require_once('/customers/f/c/...') #6 /customers/f/c/4/hairbystella.dk/httpd.www/index.php(17): require('/customers/f/c/...') #7 {main} thrown in /customers/f/c/4/hairbystella.dk/httpd.www/wp-includes/class-wp-hook.php on line 303