Avast for Business (free) blocking wix.com website creator

A customer just called me that he cannot edit his webpage.
He is using a hosted website builder at WIX.com
Immediately when he tries to open the edit page: http://editor.wix.com/html/editor/web/renderer/edit/
Avast pops up with a warning: HTML:Script-inf

I know that this has to be a new error (I suppose that WIX is not infected) - as I tried something this morning and didn’t get this error.
Same warning appears on a different PC on a different network with Avast Internet Security.

Christoph

Could be that Wix is heaving problems.
I get a 404 there.

I cut of the link, as these are session based URLs, so they won’t work anyhow (or not for very long).

https://www.virustotal.com/en/file/b008ff07350f4cc9da3ca958502c042e70c3b635c3e1c2ec978cb02889c2e514/analysis/1495039730/

Report it to avast.
https://www.avast.com/report-a-url.php

https://forum.avast.com/index.php?topic=202543.msg1395059#msg1395059