Fatal error: Unsupported operand types in form.inc
Duplicate of this question:

Db_Query Fatal error: Unsupported operand types

It turns out that I was setting my page callback to a drupal_get_form with no form present.

I changed my hook_menu to:

function MY_MODULE_menu() {
  $items = array();

  $items['admin/structure/module'] = array(
    'title' =&gt; 'description of module',
    'description' =&gt; 'Configure settings for module',
    'page callback' =&gt; 'MY_MODULE_admin_menu',
    'access arguments' =&gt; array('administer site configuration'),
  );

  return $items;
}


And it worked fine.