Hello Brightskyapps,
Sorry for the inconvenience and thanks for contacting our team, we will help you to sort out the problem.
1) Make sure you have checked all the server requirements before the installation https://xstore.helpscoutdocs.com/article/60-xstore-theme-requirements
2) Provide us with server error logs to get detailed information about the mentioned error and WP Dashboard and FTP access to your site.
Regards