I took an API key from OCR Space today, and embedded it in my Java AI Chatbot. However, I am getting 404 Error Message when I try to upload .pdf document

I took an API key from OCR Space today, and embedded
it in my Java AI Chatbot. However, I am getting 404 Error Message when I try to upload .pdf document

If you test the connection with Postman, do you get the same result?

You probably know it, but just in case: Postman is a free app, see here.

If you see the problem even with Postman, a screenshot of the result could be helpful.