I see you have used a caching plugin. Please do the following:
– Delete the “cache” folder (this is usually somewhere in wp-content, but might also be in the root directory of WordPress)
– Check your wp-config.php for any lines added by the plugin and remove them
This is not an issue with X but has to do with your optimization. If you’re unsure how to completely remove plugin leftovers specially caching plugins, please seek help from a third party developer or contact the plugin author.
Thanks.