...
Template references used in will be automatically validated when the form/flow is first loaded, upon upload of a form/flow or and upon saving a form/flow. The system will show any form or flow that has templatized properties validation errors with a pink/salmon background in the list of forms/flow. These are non-fatal warnings, and will still allow the form/flow to run. Errors can occur when a control referenced with a template is renamed or deleted, or when there is a typo in the template.
...