Issue Overview

Preview doesn't work after modifying on published posts.

Steps to Reproduce (for bugs)

1.Add new post.
2.Write a title and add new paragraph block.
3.Publish it.
4.Delete the paragraph block.
5.Click Preview

Expected Behavior

Display the preview.

Current Behavior

The blank popup is showed and shows the message"Please wait…Generating preview." but nothing happens.

Possible Solution

Screenshots / Video

The post in the gif was already published. I did Step 4 and 5 of "Steps to Reproduce"

Related Issues and/or PRs

Todos

• Tests
• Documentation