React Studio Activation not working

This is quite serious for us right now:
We are trying to test if ReactStudio is a good tool for us (the marketing sounds like it might be) but as soon as we open ReactStudio we cannot proceed since the activation window cannot be closed. We cannot activate it since any data that we put into the window results in an error response (with HTTP400 reason) as soon as we click “activate”.

What are we doing wrong? Any way to get around this?

Same for me. But I’ve got it to work. If you close React Studio the activation window stays open. Then you can click the activate button.