scandir()

Started seeing these errors coming from the plugin:

Message: Error: scandir(): (errno 0): Success
#0 scandir(): (errno 0): Success:: called at [/home/bffebafc/public_html/wp-content/plugins/wp-fastest-cache/inc/js-utilities.php:229]
#1 ::error_handler called at [:0]
#2 ::scandir called at [/home/bffebafc/public_html/wp-content/plugins/wp-fastest-cache/inc/js-utilities.php:229]
#3 JsUtilities::mergeJs called at [/home/bffebafc/public_html/wp-content/plugins/wp-fastest-cache/inc/js-utilities.php:100]
#4 JsUtilities::combine_js called at [/home/bffebafc/public_html/wp-content/plugins/wp-fastest-cache/inc/cache.php:547]
#5 WpFastestCacheCreateCache::callback called at [:0]
#6 ::ob_end_flush called at [/home/bffebafc/public_html/wp-includes/functions.php:3721]
#7 ::wp_ob_end_flush_all called at [/home/bffebafc/public_html/wp-includes/class-wp-hook.php:298]
#8 WP_Hook::apply_filters called at [/home/bffebafc/public_html/wp-includes/class-wp-hook.php:323]
#9 WP_Hook::do_action called at [/home/bffebafc/public_html/wp-includes/plugin.php:453]
#10 ::do_action called at [/home/bffebafc/public_html/wp-includes/load.php:677]
#11 ::shutdown_action_hook called at [:0]

I have a report from raygun.com so have more details to share if you can contact with PM.

Thanks,