Authentication erroe/401/API not found

In a few of my projects, I am facing this issue and it is only happening with 2-3 users as of now.

  1. I am unable to grant them permission as it is showing that the username is invalid whenever i use the actual username for eg. “Abcd”. But I can give access to “abcd” and it is still showing up on their dashboard and they are able to get till the form. But as soon as they fill a form and press submit, its giving them an “error 401”.
  2. I even tried logging into their account to check for the issue. When i checked the settings it showed “failed to get api token”, “authentication credentials were not provided”.
  3. I have tried logging in/out/incognito and different devices but the issue still persists. The forms are on the global server.
  4. Rest of the users are still able to submit normally.

Welcome to the community, @aditiiii_3785! Could you also check if the user has used the correct login credentials when submitting the form if the project is not set to `Allow submissions to this form without a username and password`? In addition to this, please also ensure that the account from where you are not able to make submissions has set off MFA settings to their account if they have enabled it. Let us know what happens.