when you, for some reason, need to create a new billing account manually from the publish tab, the link will open at the right place, but the billing creation itself will fail, close and take you back to the prototyper page. In general, all this billing process is one of the most annoting processes in the fb studio. There so many “time eaters” in the platform that do not get any attention. The platfrom must simplify the integration processes of google feature and services, or noobies and lazy dudes (like me) will run a way.