I have a project with forms and am trying to create appuser.
While using the QR in ODK Collect I am not able to download forms and use forms.
It is asking for username and passwd.
Other projects seem to be working fine.
2. What steps can we take to reproduce this issue?
Is that an unmodified screenshot from your app? I think something is going wrong with the configuration. The URL should include a token and project number - not have "undefined" in the URL.
Something has gone wrong, but I don't know if it's with Central or Collect. What versions of each are you using? Are both stock or have they been modified.
Please you send a copy of the App User QR Code to support@getodk.org so we can investigate.