Background of the issue:
I suspect WPML is making changes to the htaccess file that are causing the site to crash. The problem started to occur after the Elementor update, but I cannot say with certainty that this is the clear cause. The nature of the problem and the changes I am noticing in htaccess suggest to me that it could be a WPML action triggered by some action/click. The site I need help with is hidden link. Here is the htaccess configuration before and after the change: