Invoke api giving follwoing error

{“ParsedResults”:[],“OCRExitCode”:99,“IsErroredOnProcessing”:true,“ErrorMessage”:[“Unable to process the file. Please check if the file has sufficient permissions and allows access and is not corrupt.”],“ProcessingTimeInMilliseconds”:“343”,“SearchablePDFURL”:""}\Users\sk12t\Downloads\R4&filetype=pdf
This is what I am trying

C:\Users\sk12t\Downloads\R4 is not a URL to a PDF, that is why you get this error.

This works ok:

If you want to upload a file from your hard drive, you can not use the GET method, but you must use the POST method, e. g. with the CURL tool: