Hi @rohan and team, thanks for being so prompt and proactive about addressing this.
I found my way to this thread because I too am having the same issue; were you able to make any headway and/or know more about the possible culprits? My calendars are hosted by a premium email provider and I’ve setup sharing permissions to allow Google to subscribe to those 6+ calendars. I’ve also connected to the Tidbyt and installed the Google Calendar app but that’s where my luck runs out with the same clock icon.
You mentioned calendar names: fwiw, each of my calendars has an emoji in the title/resultant URL for subscribing. Maybe that’s the problem?