Edits to a page result in "Something went wrong"

[Stephen Lee]

We had a confluence page of meeting notes taken by one team member during the meeting.  At one point she wanted to update the page but we get this error.  

"Something went wrong

Our team has been notified. If the problem persists, please contact Atlassian Support and be sure to give them this code: opgg5u."

That was Friday.  Today, when I try to edit the page, I get the same.  The page is still readable.  It's just not editable.

[Stephen Lee]

One person suggested that if you have attachments referenced on the page but then delete the attachments before deleting the reference to it, this error will occur.