Something is definitely up right now. Running into the same exact issue. Builds aren't appearing in Testflight or under the Activity tab after successful upload through XCode

If usePopup is giving you problems, a workaround is to bypass the Apple JS SDK and open the pop-up manually. When I did this, clicking on "Continue" after the user verified their credentials redirected the pop-up to my redirect uri, regardless of whether or not the popup and redirect uri were on different subdomains. Here's the sample code that gets called whenever a user clicks on my "Sign In With Apple" button: const handleClick = () => { 				const oauthUrl = `https://appleid.apple.com/auth/authorize?response_type=code&` + 				`client_id=${CLIENT_ID}&scope=name+email&response_mode=form_post&` + 				`state=${STATE}&redirect_uri=${REDIRECT_URI}&nonce=${secureRandomString(32)}` 				const windowWidth = 450 				const windowHeight = 600 				const left = window.screen.width / 2 - windowWidth / 2 				const top = window.screen.height / 2 - windowHeight / 2 				window.open(oauthUrl, 'Apple Sign-In',`menubar=no,location=no,scrollbars=no,status=` + `no,width=${windowWidth},height=${windowHeight},top=${top},left=${left}`)	 		}

If usePopup is giving you problems, a workaround is to bypass the Apple JS SDK and open the pop-up manually. When I did this, clicking on "Continue" after the user verified their credentials redirected the pop-up to my redirect uri, regardless of whether or not the popup and redirect uri were on different subdomains. Here's the sample code that gets called whenever a user clicks on my "Sign In With Apple" button: const handleClick = () => { 				const oauthUrl = `https://appleid.apple.com/auth/authorize?response_type=code&` + 				`client_id=${CLIENT_ID}&scope=name+email&response_mode=form_post&` + 				`state=${STATE}&redirect_uri=${REDIRECT_URI}&nonce=${secureRandomString(32)}` 				const windowWidth = 450 				const windowHeight = 600 				const left = window.screen.width / 2 - windowWidth / 2 				const top = window.screen.height / 2 - windowHeight / 2 				window.open(oauthUrl, 'Apple Sign-In',`menubar=no,location=no,scrollbars=no,status=` + `no,width=${windowWidth},height=${windowHeight},top=${top},left=${left}`)	 		}