Gotcha! I think I see where the confusion may be coming from, and I’ve documented within our team to work to clear this up. Your original request was to a meetings endpoint, which while the message says “Cannot access webinar info.”, is actually attempting to access Meeting information (through /meetings/{meetingId}/ ). You’re attempting to update the livestream of a webinar, which currently is only available through the web interface. I’ll add this as well to our requested improvement plan.
I understand this is confusing, and we’ll work to make this more clear. Please do let me know if I can help further.