Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "pw_add_script_wp_footer" not found or invalid function name in /var/www/vhosts/qkltsgrf.host231.checkdomain.de/new/wp-includes/class-wp-hook.php:324
Stack trace:
#0 /var/www/vhosts/qkltsgrf.host231.checkdomain.de/new/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#1 /var/www/vhosts/qkltsgrf.host231.checkdomain.de/new/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#2 /var/www/vhosts/qkltsgrf.host231.checkdomain.de/new/wp-includes/general-template.php(3208): do_action('wp_footer')
#3 /var/www/vhosts/qkltsgrf.host231.checkdomain.de/new/wp-includes/template-canvas.php(25): wp_footer()
#4 /var/www/vhosts/qkltsgrf.host231.checkdomain.de/new/wp-includes/template-loader.php(106): include('/var/www/vhosts...')
#5 /var/www/vhosts/qkltsgrf.host231.checkdomain.de/new/wp-blog-header.php(19): require_once('/var/www/vhosts...')
#6 /var/www/vhosts/qkltsgrf.host231.checkdomain.de/new/index.php(17): require('/var/www/vhosts...')
#7 {main}
thrown in /var/www/vhosts/qkltsgrf.host231.checkdomain.de/new/wp-includes/class-wp-hook.php on line 324