"Content failed to load" error when opening page edit screen

Question

Across our organisation we are experiencing an error (code: 3k9urj) when users are trying to edit pages using the new edit screen. The error appears as shown below when the edit button is pressed:

Pages using the old editing screen are still editable.

Is this an issue affecting other organisations and is there a workaround?

Is this an issue caused by current system maintenance?

Marcin Prokop · Answer

I resolved this. I copied the page and then the edit worked. Later I changed name pages and deleted the old version

Tomas.Elek · Answer

In my case it was unlikely, I was the only person editing. My issue was unresolved and I decided to start from scratch.

marcin.prokop · Answer

I have this same problem.

Does it mean that somebody editing the page in this moment and can't go there?