Hi there,
Sorry to hear you ran into issues with the new update. I’m also not sure why your post was held for moderation – I saw the original post and responded to that, but it seems to have gone missing now.
Could you please confirm the WordPress and PHP version that you’re seeing issues on?
Also, could you please check to see if there are any errors logged? You should be able to do that by enabling WP_DEBUG and WP_DEBUG_LOG if you haven’t already, and then reload the page when the critical error occurs:
Debugging in WordPress
Alternatively, if you have any details from your server’s PHP error log, feel free to send that over as well.