Calendar 'Connection Failed'

‘Attempt to connect to icloud calendar failed’
This is a new error - I’ve successfully been hooked to the icloud calendar for over a year. No showing any errors in the ‘Operations’ tab.

Looks like something is getting canceled: 12:27:41 PM at MailClient.Protocols.CalDav.ProtocolCommands.Connector.RunCommand(CalDavAccount account, ICommand command, CancellationToken cancellationToken)