Fix include when event.sponsor is null [WEB-1198]
Fix include when event.sponsor is null [WEB-1198]

Argument 1 passed to App\Transformers\Outbound\AbstractTransformer::transform()
must be an instance of Illuminate\Database\Eloquent\Model, null given, called
in /var/www/data-aggregator/vendor/league/fractal/src/Scope.php on line 376

art-institute-of-chicago/data-aggregator,art-institute-of-chicago/data-aggregator,art-institute-of-chicago/data-aggregator