If you're getting this error: "Error: base: Image uploading failed", it's because the featured image for your blog post is broken. 

How to Resolve The Image Uploading Failed Error

  1. Click on Page Settings on the left-hand side of the editor.
  2. Scroll down to the Featured Image option and click "remove" to clear out the broken image.
  3. Upload the image again, or an entirely new image, or leave it blank.
  4. Save and republish.

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