PHP Warning: Creating default object from empty value in /app/public/wp-admin/includes/post.php on line 708

Has anyone seen this error? I get this every time I click “Add New” to posts or pages. I’ve done a conflict test with all plugins disabled and switched to a twenty* theme, and the issue persists. I’ve also run a Health Check using the plugin, and the only issue I can see is “The required module, mcrypt, is not installer(d), or has been disabled.” Does Local usually run without this module?
Stack trace:

    1. {main}() /app/public/wp-admin/post-new.php:0
    1. get_default_post_to_edit() /app/public/wp-admin/post-new.php:66

I think my issue was due to not doing a complete search-replace on the db when importing. How do you close these issues?