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Make sure you have checked all the server requirements before the installation – https://xstore.helpscoutdocs.com/article/60-xstore-theme-requirements
Were all required plugins activated? In case if automatic plugin installation fails, you can install them manually via your Dashboard: Plugins > Add New > Upload Plugin > Browse plugins archives. Or via FTP, by uploading and extracting the plugin zip files into wp-content/plugins folder – https://www.8theme.com/download-plugins/
Then try to install the demo content from XStore > Import Demos – https://xstore.helpscoutdocs.com/article/34-demo-content
Let us know the result.
If you need any further assistance, provide temporary wp-admin access.
