Just in case it will help anyone, problem was in deployment without SSL.
@donte.zoom Can you please help with one more question, now when I’m trying to test two meetings at one time, I found out it’s impossible, since I’m hosting it with one account. I’ve found Concurrent meetings - #8 by tommy this one, is this still a best practice? There’s no option to create users dynamically, at least to do it from my backend? Or on some pro/business/super-mega-pro accout to host more meetings?
Just can’t understand, what’s the point of videocall app, where only one call is possible at the time. (Also, this probably should be written on the first page here Zoom Meeting SDK)