Tried again this morning and I got it!

Not sure who worked some magic, but thank you!

My Steam games are set to public. I was able to do this before, but my old computer crashed.

I'm getting the following error messages:
{"requestId":"f2388730-2892-4821-9aa7-b5672684ff24","errors":[{"status":"500","title":"java.lang.IllegalArgumentException","detail":"Steam redirect could not be validated! Original response:\n\u001F�\b\u0000\u0000\u0000\u0000\u0000\u0000\u0003\u0003\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000"}]}

----logged out and tried again-----

{"requestId":"f2296adf-454b-43a0-9eb3-78e913bf9169","errors":[{"status":"500","title":"java.lang.IllegalArgumentException","detail":"Steam redirect could not be validated! Original response:\n\u001F�\b\u0000\u0000\u0000\u0000\u0000\u0000\u0003\u0003\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000"}]}