Similar issue. WP 3.9. ACF 4.3.7. My “Create a new task” submit button displays, but no form, and this error message: “Warning: array_merge() [function.array-merge]: Argument #1 is not an array in …wp-content/plugins/advanced-custom-fields/core/api.php on line 1185”
<?php acf_form(array(
'post_id' => 'new_post',
'new_post' => array(
'post_type' => 'todo_task',
'post_status' => 'publish'
),
'submit_value' => 'Create a new task'
)); ?>
