CSV export has stopped working

[John Plant]

I do a CSV export each month on several reports we have set up, but I can no longer use this, the option is there but when I click it nothing happens. HTML and the others work fine, just not CSV? I've tried using chrome and Safari, also tried 3 different laptops (all Macs) with the same result?

A few others have said the same thing as me, but there's another group who are saying it's working fine, so there's no logical explanation?