scrollFX.js - failed to load resource...?

At some point during my work with Blocs and exporting the site on my subdomain, I got an error when inspecting the page or taking it on a test drive with, saying that a resource (scrollFX.js) failed to load or cannot be found.

Any idea where that might come from or what’s using scrollFX.js? I have no scroll effects enabled, used Smartnav, deleted it and tried again, but the error is still there…

And no, I haven’t used any Scroll FX animation on the site.

Edit: I have enabled a scroll FX animation for testing purposes, the Browser Error is gone then, even after disbling the animation after that. Dunno what happened, but the issue seems solved. For now.