Blank pages for all custom API calls after update

I have custom API calls set up by adding controllers from a different directory using the following code:

// loop through each file and include it
	foreach ( glob( dirname( __FILE__ ) . '/api-controllers/*.php' ) as $filename ) {

		// include file
		require_once( $filename );

		// make controller name lowercase
		$filename = strtolower( $filename );
		$filename = str_replace( '.php', '', $filename );
		$filename = basename( $filename );

		if ( $filename != 'index' ) {

			// Register the source file for JSON_API_<controller name>_Controller
			add_filter( 'json_api_' . $filename . '_controller_path', 'APS_controller_path' );
		}
	}

	// modify the controller location so we don't have to put controllers in plugin directory
	function APS_controller_path( $default_path ) {

		// get what controller this is
		$controller = basename( $default_path );

		// set new path to controller directory
		return dirname( __FILE__ ) . '/api-controllers/' . $controller;
	}

	// register new controlelrs to use
	function APS_controllers( $controllers ) {

		// loop through each file and setup a controller for it
		foreach ( glob( dirname( __FILE__ ) . '/api-controllers/*.php' ) as $filename ) {

			// make controller name lowercase
			$filename = strtolower( $filename );
			$filename = str_replace( '.php', '', $filename );
			$filename = basename( $filename );

			if ( $filename != 'index' ) {

				// add our controllers to existing controllers
				$controllers[] = $filename;
			}
		}

		// return controllers
		return $controllers;
	}

It seems after the update, none of them work. I simply get a blank white screen.

http://wordpress.org/extend/plugins/json-api/