How can we get the error message of field validation Rule written in VBCS on HSDL load

Summary:

We have created a validation rule for specific fields on the Redwood additional person info page within the VBCS business rule. However the same is not getting triggered during the HSDL load for the same scenario. How to implement the same.

We are preventing user from entering any special character on freeform text field in VBCS "configure validation" but the same is not triggered on the HSDL

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

25C

Code Snippet (add any code snippets that support your topic, if applicable):