Fatal error: Uncaught Error: Call to a member function parent_post_id() on bool

Hi,

I’m doing an Export/Import of a website with some recipes created with WP Recipe Maker.
The import process fails after a while once it gets to a post with a recipe.

This is the error:
Fatal error: Uncaught Error: Call to a member function parent_post_id() on bool in \wp-content\plugins\wp-recipe-maker\includes\public\class-wprm-post-type.php on line 87

Is this a known issue?
I couldn’t find anything about this topic.

Thank you.