I have the code from a customised story map that I would like to modify and use on my own story map (I have permission from the author). However, when I go to add the code into my ArcGIS online account I get a popup that says the file type is not supported.
The code is written in JavaScript and is about 3 years old.
If you have any clues on how I can make this work or other tips on how I might be able to customise my storymaps with code your input would be very welcome!