A frozen post on WordPress (only a single post, everything else works fine)

I found that after publishing a post I could not get into it. Each time I tried to edit it, the screen would freeze.

Solution

The problem was a <span "> error. The " is an error. It came in while I was deleting something from the source code. I forgot to delete the ".

Step 1: Note the post number. This is displayed at the top (in the URL field).

Go into phpmyadmin.

Select the relevant database

Browse field "wp_posts"

sort post IDs and identify the relevant post

Go into the post and edit the HTML code. 

Save ("Go").

The problem will disappear like magic!