Outlook Web error using Safari 18.3.1 Error is Cannot Parse Response

When I first login to Outlook on the web, everything is fine but after a few minutes, if I try to load an email, it will not load and if I refresh Outlook I get an error message which says Safari Cannot open the page https://Outlook.office.com (etc. etc.) Error is: "Cannot Parse Response" NSURLErrorDomain:-1,017. If I quit Safari altogether it will work ok for a short time and then the same thing happens again. It is quite frustrating.