Hi,
it is really difficult to say without checking your site.
let us know your wp-admin login details to check this.
Before that make sure your hosting plan meets these requirements : https://www.8theme.com/documentation/xstore/theme-installation/xstore-theme-requirements/
And, you do not have any 3rd party plugins which are NOT listed here : https://www.8theme.com/documentation/xstore/plugins/included-plugins/















