Use the verify command to check if the success message on the right is displayed correctly.
Open the Herbie extension and type the following commands in Herbie Tab:
By ID:
verify "Success" in '#message'
By Class:
verify "Success" in '.message-class'
By XPath:
verify "Success" in "//div[@role='alert']"
This will verify that the text "Success" is present in the message on the right.