Zoom Scheduler calendar issues

[LK1981]

Hoping somebody can help with this as I’ve been sending multiple messages with support but I am still without a resolution. I have been using Zoom Scheduler for at least a couple of years now and I have always used the same calendar.  For some unknown reason, over the last week or so I have been receiving requests to authorise integration with my calendar, once I did this it worked temporarily but now my calendar has completely disconnected and I am unable to integrate at all. 

Just to confirm that I have made no changes to my account etc but it seems after the most recent Zoom update this has caused issues. I am using Mac desktop app. Any help or suggestions appreciated.