Authentication failed: com.microsoft.identity.client.exception.MsalClientException: Missing required tokens of type: {0}

Implemented Azure B2C login.

Suddenly app getting this error. unable to find where the issue is. can anyone help

we are using below source: https://github.com/Azure-Samples/ms-identity-android-java

from Authentication failed: com.microsoft.identity.client.exception.MsalClientException: Missing required tokens of type: {0}