How to load codemirror in Web view?

Sir I Find codemirror html editor and how to use on this link: CodeArea: A Code Editor For Your App - #ShareYourApps - Thunkable Community but when i use this method on makeroid it don’t work. It shows a screen like this:

and does not allow for adding code but on thunkable it works. Can you tell me how can i run it on makeroid? It said it just need a WebViewer that has CodeMirror embedded into it. Please Help?