dify integrates local PaddleOCR service

I deployed the PaddleOCR service on the Dify server. I successfully ran image recognition by calling the official API in the workflow, but calling my own deployment resulted in a 503 error.

API request failed, maximum retries reached: 503 Server Error: Service Unavailable for url: http://paddleocr:8866/doc_parser

Seeking a solution.