Fix a bug with the multi-field, single entity upload
Fix a bug with the multi-field, single entity upload

hiromi2424/CakePHP3-Proffer,davidyell/CakePHP3-Proffer,srubengt/CakePHP3-Proffer,Kamoris/CakePHP3-Proffer,TituxMetal/CakePHP3-Proffer