filament v3: file upload on custom page

Hi guys, so I have this custom page which implements

HasForms

HasForms

and uses the

InteractsWithForms

InteractsWithForms

trait.

I've added a File Upload field to the schema, but anytime I upload an image, I get this error:

Property type not supported in Livewire for property: [null]

Property type not supported in Livewire for property: [null]

Anyone encountered this error in V3?