Same problem with polylang
When activating the Polylang plugin, certain blocks made in Elementor are no longer displayed https://prnt.sc/CH3OUgswOZcL.
I received this response from Elementor tech support:
Regarding your concern: It seems the issue is coming from your Polylang plugin, when it disabled the posts loads fine https://prnt.sc/E88GYc8EQYLB
So there could be something wrong with the Post translation.
As we have no control over coding for third-party plugins nor themes, we highly recommend that you report this issue to the support team for this plugin so they may further troubleshoot and provide any recommendation (or possible fix) to resolve this issue.
