Define a Field Validation Rule
Administrators can define Validation Rules to ensure that users fill out necessary fields with valid information. If fields with Validation Rules are incomplete or invalid, an Error Message displays at the top of the page which administrators can customize. If multiple Validation Rules are not met when constituents submit a form, they will see multiple Error Messages. See About Validation Rules (external) to learn more.
The Error Location field is not currently supported in Community Hub. All Validation Rule Error Messages display at the top of the page in Community Hub.