Hello, @Dominick,
I have checked your site and found your server requirements do not meet the theme’s requirements. First of all please downgrade your PHP version to 7.4.33. For this Please contact your service provider and ask them to fix server requirements to meet theme requirements. See the image for the theme requirement: https://ibb.co/K59FJhk
And then the theme should be updated first, then the Core plugin. Check our theme documentation Xstore Theme update here: https://www.8theme.com/documentation/xstore/theme-installation/theme-update/
Regards 8Themes Team.