"this game seems to be nonfictional at your device" error?

I've had this pop up on the last two games i've uploaded (made in construct 3, exported to html5, played on chrome and safari)

"We are sorry, this game seems to be nonfunctional at your device. Please, try a different game,"

If I press close (or ok) it clears the message and loads perfectly fine but it is off-putting to visitors to the site, does anyone know why this message would show and how I can make sure it doesn't?

It shows up on these pages after the video pre-loader

jmkit.com/playsets/home

jmkit.com/playsets/school

It does the same when other pre loaders aren't used also

Construct doesn't ever generate a message like that itself, so it must be coming from somewhere else. Maybe it comes from the website or a third-party addon.

I suspected that but thank you for confirming