@garrett-davidson Thanks your reply. It's been a while since I added the AASA file. I have additional questions. Does the DNS server address itself have to be valid? Right now it's responding with a 404 error because the page doesn't exist.

I tried removing the port number of RPID by allowing port 443. As a result, the origin value of clientDataJson is changed, so authenticating does not proceed. What should I do?