Im encountering this error on this step
After the last step error still existsTIA
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Appian treats images as documents. So you need to have a way to refer a document to pass it in the image component. Now in the exercise you are doing, images will be referred to by their IDs. And it looks like either you haven't configured it correctly or you don't have a document/image ID for that particular vehicle.
You will need to add a document ID it the corresponding row in the DB and then sync the respective record to have it visible.