A little error in the ss_acf_integrate class: Change these two:
/**
* Creates a json load point
*
* @since 1.0.0
*/
public function acf_json_load_point( $paths ) {
$paths[] = $this->acf_json;
return $paths;
}
/**
* Creates a json save point
*
* @since 1.0.0
*/
public function acf_json_save_point( $path ) {
$path = $this->acf_json;
return $path;
}