Hello,
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Please note that we provide support for XStore theme, but your question relates to code which comes from PageLayer plugin. I would recommend you to contact support of the plugin next time.
Here is a list of plugins which comes bundled with our theme – https://www.8theme.com/documentation/xstore/plugins/included-plugins/
Sorry, but we don’t give a guaranty for full theme compatibility with all 3-rd party plugins.
Regards