Error when posting image

Tried to post this:

https://lohas.nicoseiga.jp/o/3dfb20dd50a1c9658bafb790dcf28a7c02aee551/1623710448/2031037

Source: https://seiga.nicovideo.jp/seiga/im2031037

Error given:
ActiveRecord::RecordInvalid exception raised
app/logical/upload_service.rb:41:in `start!'
app/controllers/uploads_controller.rb:55:in `create'

Make sure to upload the actual file.
All other upload methods are broken.

Sorry to necro, but having a similar problem with an image upload:

Error given:
ActiveRecord::RecordInvalid exception raised
app/logical/upload_service.rb:37:in `start!'
app/controllers/uploads_controller.rb:55:in `create'