Pattern for all Book page paths

Fresh version of Drupal 7 > enable pathauto and Book > Pattern for all Book page paths > [node:bookpathalias]/[node:title]

Add book page > Book outline Save

Results in the error below

    *  Warning: Illegal offset type in isset or empty in drupal_lookup_path() (line 105 of D:\xampp\htdocs\dev7b\includes\path.inc).
    * Recoverable fatal error: Object of class stdClass could not be converted to string in drupal_lookup_path() (line 111 of D:\xampp\htdocs\dev7b\includes\path.inc).