We have no idea what is wrong after update the latest theme, the site often shut down many time a day, we don’t install any 3rd party plugin. Our server AWS really powerful and set up 3 time bigger than the theme require.
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Could you provide error logs from your server? What errors do you have there? We need more detailed information from your hosting provider about errors that makes your site down. We’ll check these errors and we’ll be able to understand if this could be fixed and how.