Hello Leo,
Thank you for contacting us and for using XStore.
Updates should not cause problems.
If you face a problem not the first time, did you ask your hosting provider to create a full site backup before the update or did you create a backup by yourself? The backup can help to restore the site in case something goes wrong.
Do you use a child theme? Was the child theme activated before the update but now you activated the parent theme?
Kind Regards,
8theme team