Hello,
Also, do not forget to clear all cache after the next update.
You can create a staging site (full copy of the existing one) and do updates of the theme and plugins there first https://xstore.helpscoutdocs.com/article/63-theme-update https://xstore.helpscoutdocs.com/article/37-plugins-update If everything is ok then you’ll be able to update the production site.
Regards