Class name must be a valid object or a string Class name must be a valid object or a string in common.inc, line 7848

Hello,

Class name must be a valid object or a string Class name must be a valid object or a string in common.inc, line 7848

Here's the function in question:

/**
 * Gets the entity controller for an entity type.
 *
 * @return DrupalEntityControllerInterface
 *   The entity controller object for the specified entity type.
 */
function entity_get_controller($entity_type) {
  $controllers = &drupal_static(__FUNCTION__, array());
  if (!isset($controllers[$entity_type])) {
    $type_info = entity_get_info($entity_type);
    $class = $type_info['controller class'];
    $controllers[$entity_type] = new $class($entity_type); //line 7848 that barfs
  }
  return $controllers[$entity_type];
}

I put some watchdog debug code in there and I find that the entity causing the error is fluxservice_service, and that $class is undefined.

Funny thing, this happens on prod but not on local. I'm checking the libraries and stuff, but when I run the following I get no results:

entity_get_info($entity_type = 'fluxservice_service');

So that would be a problem. I'm updating the libraries and I'll do some digging to see what's up. Sort of mysterious.