Basic auth has been removed as well, Out of interest as I don’t know that UI does Unraid come with a template for running n8n or is it something you have to manually configure?
I guess to work out what is going on I would need to know more about the unraid process as it should in theory all be good if you have gone through the migration guide.
You can delete that part but it won’t solve the issue, Looking at the XML there is an issue in the template where it is using the old user path so that will need to be updated.