Unknown Cache nxapi-appledaily-com-hk in quick cache pro

Quick Cache Pro

WP 4.0

Today, the following reported in my Error Log at 09:54

[10-Nov-2014 09:54:59 UTC] PHP Fatal error: Uncaught exception ‘RuntimeException’ with message ‘SplFileInfo::getMTime(): stat failed for /home/myusername/public_html/wp-content/cache/quick-cache/cache/http/mywebsite/admin-php.html’ in /home/myusername/public_html/wp-content/plugins/quick-cache-pro/quick-cache-pro.inc.php:1293
Stack trace:
#0 /home/myusername/public_html/wp-content/plugins/quick-cache-pro/quick-cache-pro.inc.php(1293): SplFileInfo->getMTime()
#1 [internal function]: quick_cache\plugin->purge_cache()
#2 /home/myusername/public_html/wp-includes/plugin.php(580): call_user_func_array(Array, Array)
#3 /home/myusername/public_html/wp-cron.php(103): do_action_ref_array(‘_cron_quick_cac…’, Array)
#4 {main}
thrown in /home/myusername/public_html/wp-content/plugins/quick-cache-pro/quick-cache-pro.inc.php on line 1293

And in my Cache at 09:54

There is an unknown Cache nxapi-appledaily-com-hk

/public_html/wp-content/cache/quick-cache/cache/http/nxapi-appledaily-com-hk

I have checked with my host and it is not on the server.

https://wordpress.org/plugins/quick-cache/