"Unknown error, the response body from fetch is: undefined" at Auth.confirmSignIn

Describe the bug I am trying to send the verification code received by the user to confirm the signIn, I have the SMS_MFA enabled. However, I keep getting this error Unknown error, the response body from fetch is: undefined and thats all I get, there is nothing else to help me understand what the error is about. And everything else is working fine, I call signIn, signUp, confirmSignUp and resendSignUp, they all work fine. The problem is only with confirmSignIn and I have no idea what it could be, I already researched online, but had no success. Another strange thing that happens, when I enter the wrong code, it shows me the ‘CodeMismatchException’, but it fails with ‘Unknown error’ when code is the right one. PS: I already have cognito configured to work with SMS MFA

To Reproduce Steps to reproduce the behavior: I just installed aws-amplify and started using Auth according to the docs, everything else works fine, it’s just when I call confirmSignIn

Expected behavior Receive a successful response when the correct code is sent for verification.

Smartphone (please complete the following information): The problem happens in android and iOS

Additional context I’m using: react-native version 0.55.4 aws-amplify version ^1.0.11

Code I have a file where a call all the Auth functions and export them

export const confirmSignIn = (cognitoUser, code) => Auth.confirmSignIn(cognitoUser, code, 'SMS_MFA');

Then I call that confirmSignIn function from a different file

confirmSignIn(cognitoUser, code).then((userSession) => {
         console.log(userSession);
      }).catch((error) => {
         switch (error.name) {
           case 'CodeMismatchException':
            this.codeInput.clear();
            break;
           default:
            console.log(error);
            break;
        }
      });

[d-olivas]

@jordanranz not anymore. After I posted the issue I didn’t use the confirmSignIn for a while and forgot about the issue and then I had to use it again and it’s working fine now. I’m using the same react-native version, 0.55.4, react 16.3.1 but updated the aws-amplify to ^1.1.19, probably that was it.

[github-actions[bot]]

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