I don't have the ability to edit this post. First time I ran into this. I checked other questions and it seems I can edit them. Yes, I understand I can edit, but it won't save till a mod approves it.
I wonder if it was because there was another edit pending. I've approved that edit. See if you can edit it now.
That's because there is already a pending edit on it. No one can edit that post until that pending is cleared.