I am unable to login to our site - getting a 'Problem with Cookies' error message. Cookies are fully enabled and nothing has changed since I started using Voice 4 months ago. I have now deleted all cookies but still the problem persists.

I *can* login using a different account on the same machine (hence this message).  Not ideal though.

Using an iMac and Safari (v13.0.5) as a browser.  (The 'Help' page still refers to v3 & 4 of Safari!)