Tawk.to not showing on Chrome/Opera

I’ve installed the Tawk.to app, but it’s only showing on IE and Edge, Opera and Chrome just don’t show it, nor does mobile.

It does however show on Opera and Chrome when logged in to the backend?

Can you see if there are any JavaScript errors in the browser’s console? This doesn’t happen with other apps so it’s likely the tawk.to app is malfunctioning.

I can’t see that it’s getting any JS errors on load? - carwitter.com