Demo not working ... Missing ../lib/codemirror.js

None of the demo codes of recent releases works. They are loading codemirror.js from …/lib/codemirror.js but there isn’t codemirror.js in /lib folder, it only has codemirror.css.

Any help is appreciated.

You seem to be using the git repository as installation source. Don’t—you can get a proper release as a zip from the website, or install the library with npm.