Error in Module Manager when there is a relationship involving a native post type

Symptoms

If you have a post relationship that involves a native or a third-party post type (Posts, Pages, etc.), visiting a Module Manager admin page will result in an error and you won’t be able to use this page.

Workaround

This issue will be fixed in the upcoming version of Types.

As a workaround, you can download this patch and replace the module_manager.php file found in the wp-content/plugins/types/vendor/toolset/types/embedded/includes/module_manager.php directory.