Send email via Gmail on workflow error

Send an email via Gmail when a workflow error occurs. The email subject line will contain the workflow name; the message body will contain the following information: Workflow name Error message Last node executed Execution URL Stacktrace Error workflows do not need to be activated in order to be used, but they do need to be selected in the Settings menu of whatever workflows you want to use it. To use this workflow, you'll need to: Create and select credentials in the Gmail node Choose the email recipient(s) in the Gmail node Save and select the created workflow as the "Error Workflow" in the Settings menu of whatever workflows you want to email on error

Help me set up the n8n workflow "Send email via Gmail on workflow error" (https://n8n.io/workflows/696). It uses: Gmail. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.