Fatal Error on 1.5.6 Update

Hi,

I received following Fatal Error on update to the latest version 1.5.6. I have rolled back to 1.5.5 Please look into this

Fatal error: Uncaught Error: Class ‘WP_Meteor\Blocker\Extras\MetaCharset’ not found in /home/customer/www/siraorganics.com/public_html/wp-content/plugins/wp-meteor/engine/Initialize.php:94 Stack trace: #0 /home/customer/www/siraorganics.com/public_html/wp-content/plugins/wp-meteor/engine/Initialize.php(80): WP_Meteor\Engine\Initialize->load_classes() #1 /home/customer/www/siraorganics.com/public_html/wp-content/plugins/wp-meteor/wp-meteor.php(67): WP_Meteor\Engine\Initialize->__construct(Object(Composer\Autoload\ClassLoader)) #2 /home/customer/www/siraorganics.com/public_html/wp-includes/class-wp-hook.php(292): {closure}(”) #3 /home/customer/www/siraorganics.com/public_html/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters(NULL, Array) #4 /home/customer/www/siraorganics.com/public_html/wp-includes/plugin.php(484): WP_Hook->do_action(Array) #5 /home/customer/www/siraorganics.com/public_html/wp-settings.php(423): do_action(‘plugins_loaded’) #6 /home/customer/www/siraorganics.com/public_html/wp-config.php(67): requ in?/home/customer/www/siraorganics.com/public_html/wp-content/plugins/wp-meteor/engine/Initialize.php?on line?94