"Why it failed:
This action may have failed for one of the following reasons: Password Reset functionality is disabled in Zendesk settings (see Admin > Security > Global > "Allow admins to set password" must be enabled.)
Please check if: (1) Password reset functionality is enabled in Zendesk settings."
In this case, the action in your workflow may have failed because the requisite option is not enabled in your domain's Zendesk settings. For troubleshooting this item, please read on below.