Required Field in Structure Field inside Blocks errors “Invalid form with errors”

The CMS Questions
1

Hi, I’ve got a custom block that has a structure field with a required file field inside.

blueprint: block
fields:
  cards:
    fields:
      image:
        multiple: false
        required: true
        type: files
        uploads: image
      …
    type: structure
icon: block-slider
name: Slider

When not adding a file, deleting a previously used file etc, this results in the error message Invalid form with errors, which is not at all a usable error message for the users who edit the content.

Is there a way to manually adjust this sort of error message with a plugin validator or something? Might this even be a bug in kirby itself? It seems to me that error messages, even in blocks, are usually way more descriptive than this

Thanks!

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