I have the same issue. All the sandbox users created under appstoreConnect sandbox page are getting: Purchase did not return a transaction: Error Domain=ASDErrorDomain Code=500 "(null)" UserInfo={client-environment-type=Sandbox, storefront-country-code=USA, NSUnderlyingError=0x600001028e40 {Error Domain=AMSErrorDomain Code=100 "Authentication Failed" UserInfo={NSMultipleUnderlyingErrorsKey=( "Error Domain=AMSErrorDomain Code=2 "Password reuse not available for account" UserInfo={NSLocalizedDescription=Password reuse not available for account, NSLocalizedFailureReason=The account state does not support password reuse.}", "Error Domain=AMSErrorDomain Code=0 "Authentication Failed" UserInfo={NSLocalizedDescription=Authentication Failed, NSLocalizedFailureReason=Encountered an unrecognized authentication failure.}" ), NSLocalizedDescription=Authentication Failed, NSLocalizedFailureReason=The authentication failed.}}} When attempted to login. Anyway to bypass this issue?