Most likely, it prevented you from going to their website.
I have no problem reaching their site and haven't seen any warnings.
I recall it wasn't WOT's site, I haven't tried going there. It was a long time after the computer and browser started too, and when going to a 'normal' web site that WOT had marked green. So I don't have any further clues as to the timing and why. I restarted the computer and have been using the same browser for some time, with no warning messages.