Hello,
1/ Try to disable all the third-party plugins (including cache plugins), that do not come bundled with XStore https://xstore.helpscoutdocs.com/article/36-included-plugins , clear cache of browser, and check then. Maybe one of the additional plugins is a reason for the problem. Let us know the result.
2/ Make sure that Static Blocks Cache is disabled in Theme Options > Speed Optimization.
3/ Provide temporary wp-admin access.
Regards