In the tools menu, there's an advanced editor.
Clicking it leads to an error:
The advanced editor in the Text input box is working fine.
Any suggestions as to what that advanced editor (in the tools menu) should do (the only references to an advanced editor that I can find are those to the one for the text entry box).
We've only discovered this while testing every possible thing following an upgrade, and it's not working in the live server either, not that anyone has commented!