Hi,
I’m not sure which version of DFFS you are using, but either you have an error in the script reference causing spjs-utility.js not to loaded at all, or you have an older version than the one required.
Do you see any errors in the developer console (hit F12 > Console)?
Do you see a “License and version information” link when hovering over the “Enhanced with DFFS” link in the form? – if so, what does it tell about spjs-utility.js version?
If you need to update spjs-utility.js to a newer version, but you don’t want to update the entire DFFS package you can download the new version and replace only the spjs-utility.js file in the /plugins folder.
Let me know what you find out.
Alexander