Developing a new site with Drupal 8, I was attempting to add an image to a custom block. In the editor I clicked the image icon and got a dialog to upload an image. After specifying a file (making sure it was within the upload file size), I got a strange error "Image field is required."

I took the error message literally, and created a new custom block type, adding a field of type "image" to the block. So now in the form, I have a Body and an Image field. If I try to upload using the "image" field below the body, I get the same error "Image field is required."

Error message when attempting to insert an image

I tried again using the Content / Media tab, to add an image file, and get the same error:

Error on media upload

(I also notice that there's a "Caption" checkbox but no field to enter a caption. I'm assuming I'll have a text field once the image is uploaded.)

Drupal 8.8, all current.

  • Did you check the error log at /admin/reports/dblog? Perhaps your system does not have write permission or proper group/owner to put uploaded image in the /sites/default/files folder.
    – No Sssweat
    Mar 30, 2020 at 0:46
  • Yes, thank you, there are no error messages in /admin/reports/dblog related to this, and the files directory is writable.
    – Mojo
    Mar 30, 2020 at 1:05

1 Answer 1


The error message appears to be a red herring. Even though I thought I had fixed the nginx upload file size limit, I found that it was still at the default of 1mb. I fixed the upload limits to be sufficiently large in both nginx and php, and I was able to successfully add media content.

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