Running R80.10 with take 203 & the latest MABDA hotfix. Received below temporary unofficial workaround from support. So far it enabled 3 Catalina Macbooks to function. Its only been a day so not sure how well it will work and your mileage may vary.
(•)After consulting with R&D, we provide
1. Open Safari and navigate to https://localhost:14186/id
2. “The connection is not private” message will appear
3. Click "Show Details", then "visit this webpage"
4. Confirm your action and enter the password
5.Re-open the mobile access portal in a new window and then try to connect to gw again