Error message: Cannot read properties of undefined (reading ‘External Data’)

Por que sale el siguiente mensaje de error cuando se intenta guardar sin enviar un formulario:

Cannot read properties of undefined (reading ‘External Data’)

@braulioangulo, could you share a screenshot so that the community should be able to understand your issue pictorially?

Cuando intento guardar el formulario, aparece el siguiente mensaje:

@braulioangulo, have you validated your XLSForm through this online validator to see if there are any syntax issues?