User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-45794793-20201222022139/@comment-1038387-20201222082955

The old editor, built on the 2006 editor, is no longer compatible as of version 1.32. You can pick between the 2010 editor (Source Editor) and the 2017 editor (Visual Editor and Visual Editor - source).