When you use iOS Auto-Publish, if you encounter this error:
“undefined method strip’ for nil:NilClass”
That means your Apple developer account is protected with Two-step verification.
To disable the Two-step verification, follow these steps:
– go to https://appleid.apple.com and log in
– in Security, click on Edit
– for Two-Step Verification click on “Turn-Off Two-Step Verification” and follow the steps.