Receiving error: NoneType' object has no attribute 'lower'

[dryahweh]

Hello! I am facing some errors when executing credmaster. I am executing CredMaster inside a python3 virtual environment. My current config is as follows:

 "plugin" : "msgraph",
  "userfile" : "<REDACTED>.txt",
  "passwordfile" : "<REDACTED>.txt",
  "userpassfile" : null,
  "useragentfile" : "<REDACTED>.txt",

  "outfile" : "<REDACTED>.txt",
  "threads" : 2,
  "region" : null,
  "jitter" : 15,
  "jitter_min" : 5,
  "delay" : 15,
  "batch_size": null,
  "batch_delay": null,
  "passwordsperdelay" : 1,
  "randomize" : true,
  "header" : null,
  "xforwardedfor" : null,
  "weekday_warrior" : null,
  "color" : true,
  "trim" : true,

  "slack_webhook" : null,
  "pushover_token" : "<REDACTED>",
  "pushover_user" : "<REDACTED>",
  "ntfy_topic" : null,
  "ntfy_host" : null,
  "ntfy_token" : null,
  "discord_webhook" : null,
  "teams_webhook" : null,
  "keybase_webhook": null,
  "operator_id" : null,
  "exclude_password" : false,

  "access_key" : "<REDACTED>",
  "secret_access_key" : "<REDACTED>",
  "session_token" : null,
  "profile_name" : null

When initiating the script, the spraying works as intended. I can see the usual output at first:

[2026-01-12 13:10:36.669] us-east-2: [-] FAILURE (AADSTS50126): Invalid username or password. Username: <TARGET>@<DOMAIN>.com could exist
[2026-01-12 13:10:45.354] us-east-2: [-] FAILURE (AADSTS50034): Tenant for account <TARGET>@<DOMAIN> is not using AzureAD/Office365
[2026-01-12 13:10:45.985] us-east-1: [-] FAILURE (AADSTS50034): Tenant for account<TARGET>@<DOMAIN> is not using AzureAD/Office365
[2026-01-12 13:10:56.592] us-east-1: [-] FAILURE (AADSTS50126): Invalid username or password. Username: <TARGET>@<DOMAIN> could exist
[2026-01-12 13:10:58.185] us-east-2: [-] FAILURE (AADSTS50034): Tenant for account <TARGET>@<DOMAIN> is not using AzureAD/Office365`

However, after some minutes I see these errors:

[2026-01-12 12:50:44.616] ERROR: us-east-2:<TARGET>@<DOMAIN>.com - 'error_description'                                                                                         
[2026-01-12 12:50:44.616] ERROR: us-east-2:<TARGET>@<DOMAIN>.com - 'NoneType' object has no attribute 'lower'`

Can anyone tell me which object in the script I need to modify?