* Error text to display if the value is not a valid number. For example, this can happen if a valid character like '.' or '-' is left in the field with no number (defaults to "{value} is not a valid number")
* Error text to display if the value is not a valid number. For example, this can happen if a valid character like '.' or '-' is left in the field with no number (defaults to "{value} is not a valid number")