How do we change the validation text for required fields in the chat launch form?
You can change the validation text that appears after clicking the 'Submit' button on the chat launch page if a required field has not been entered appropriately by updating the PCT_S_IS_REQUIRED_MSG message base.
The default value is: %s is required
Note: You should leave the '%s' variable and enter the desired text after it.
Path to this setting: Select Configuration from the navigation area > Site Configuration > Message Bases > and search by Key.