Hello,

I cannot tell you exactly the reason. Such often happens when there is not updated on time. Please update the theme on time.

You need to make the full backup of your site before each update, deactivate the plugins not related to the theme. As soon as the theme is updated switch child theem, check the site, then activate the plugins one by one and check.

I am sure you would not have any problems in the future.

Best Regards