The iOS Auto Provision with AppStore Connect API Step encounters the following error:
panic: runtime error: slice bounds out of range [5:4] [recovered]
This issue can happen when there are emojis in your project folder names. If the info.plist file contains any special characters/emojis, then the iOS Auto Provision with AppStore Connect API step can fail.
Please note that this does not apply to the iOS Auto Provision with Apple Id Step.
Remove the emojis/special characters from the project folder names.