Could not display interface.Please check definition and inputs error.【status code 500 error】

Hi,
Can i ask a question.
When submit button clicked and call integration object.
In the integration object status code 500 error has occured.

I got error[Could not display interface.Please check definition and inputs error].
Just i want to show error message on interface how to configure it?
When click the link of[Click here to dimiss the error message and see the resulting interface]
i can confirm the error message but i don't want to confirm like this method.
I want to display an error message when I click the button.

Plz reference below of screenshot.

Thanks.

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