Hello. I have a pro account.
I am unable to set up sync with google calendar.
I had synced it originally, but recently it doesn't seem to be working, so I tried to un-sync it and then re-sync it.
When I tried to sync them again, I got an error message saying "This app is blocked.
error message appeared and I could no longer sync.
If this function is not able to use no longer, I'd like to ask you to refund.
https://support.claralabs.com/hc/en-us/articles/1500004960641-How-do-I-fix-This-app-is-blocked-error-message-when-authorizing-Clara-app-to-access-my-calendar-
You could try to change security policy in your admin google account.
That helped me to remove "This app is blocked" error, but anyway didn't help to sync with calendar, nothing appears.