@mikemoynihan99 and i’m pretty sure i did it right from google’s side, i approved any reasonable URI and even more…
iFrame uses a very strange link: https://www-sbe-studio-com.filesusr.com
notice the ‘-’ instead of ‘dot’, that’s the exact origin URI he showed at the error screen.
i wonder how come it worked for you and i’ve tried many codes, many step-by-step guides and still - always the exact same issue.
(the domain for reference is https://www.sbe-studio.com)