Same for this account that was created for sandbox testing ...
When I go to https://appstoreconnect.apple.com/review_agree I only have a blank page, console inspector shows that the request to https://appstoreconnect.apple.com/WebObjects/iTunesConnect.woa/ra/ui/log gives this 401 response :
{
"errors" : [ {
"id" : "***************",
"status" : "401",
"code" : "NOT_AUTHORIZED.NO_ACCESS",
"title" : "An account is required to access this system.",
"detail" : "This Apple ID is not associated with any active account, so it cannot access this system.",
"links" : {
"see" : "/login?targetPrefix=/WebObjects/iTunesConnect.woa&errorKey=ITC.signin.error.invalidUser"
}
} ]
}