Hello, @parshva,
Thank you for contacting us and for using XStore.
To solve “There has been a critical error on this website” – please enable debug mode in WordPress – https://wordpress.org/support/article/debugging-in-wordpress/ to find out what error appears on your site, it will point you in the right direction and what needs to be fixed.
We hope this helps. Should you require any further assistance, please do not hesitate to reach out. We are here to help you.
Best Regards,
8Theme’s Team