REST PDF Services API not working - Getting 400 code : "CORRUPT_DOCUMENT" message

I'm currently trying to utilize PDF Services API to collect JSON data, validate the data, use the data to fill a pre-made fillable PDF, and then use the dynamically created PDF with sanitized information.

I have been trying to just get my head wraped around the API services so I built an app to test a few and none of them work, and I keep getting the same error. 

1. code: "CORRUPT_DOCUMENT"
2. message: "The input file appears to be corrupted and cannot be processed.; requestId=fV8oppi4abzgpbGH3qpxxPeRLEMoVNK1"
3. status: 400

I'm sure it's something stupid easy that I just keep overlooking, but I've been at it for an embarassingly long time. Don't judge the code too harshly, I've been throwing everything I can think of at it, and there's some random usless artifacts still floating around.

I'm fairly certain it has to do with the document upload process, but I have no idea what I could be doing differently becuase nothing I've tried has worked. Any insights or suggestions would be greatly appreciated.

import "./App.css";
import React, { useEffect, useState } from "react";
import axios from "axios";

function App() {
  const [tryStatus, setTryStatus] = useState(false);
  const [pdfStatus, setPdfStatus] = useState();
  const [masterToken, setMasterToken] = useState();
  const [masterLocation, setMasterLocation] = useState();

  const CLIENT = process.env.REACT_APP_PDF_SERVICES_CLIENT_ID;
  const SECRET = process.env.REACT_APP_PDF_SERVICES_CLIENT_SECRET;

  var statusLoc = "";
  var thisAssetID;
  var myToken = "";

  useEffect(() => {
    const fetchData = async () => {
      try {
        const tokenResponse = await axios.post(
          "https://pdf-services.adobe.io/token",
          new URLSearchParams({
            client_id: CLIENT,
            client_secret: SECRET,
          })
        );

        const token = tokenResponse.data.access_token;
        setMasterToken(token);

        const assetResponse = await axios.post(
          "https://pdf-services.adobe.io/assets",
          {
            mediaType: "application/pdf",
          },
          {
            headers: {
              "X-API-Key": CLIENT,
              Authorization: token,
              "Content-Type": "application/json",
            },
          }
        );

        const { assetID, uploadUri } = assetResponse.data;

        // Upload the PDF file
        await axios.put(uploadUri, new File(["/exportPDFInput"], "mytest"), {
          headers: {
            "Content-Type": "application/pdf",
          },
        });

        const operationResponse = await axios.post(
          "https://pdf-services.adobe.io/operation/exportpdf",
          {
            assetID: assetID,
            targetFormat: "docx",
          },
          {
            headers: {
              "x-api-key": CLIENT,
              "Content-Type": "application/json",
              Authorization: token,
            },
          }
        );

        const locationHeader = operationResponse.headers.location;
        setMasterLocation(locationHeader);

        const statusResponse = await axios.get(locationHeader, {
          headers: {
            Authorization: token,
            "x-api-key": CLIENT,
          },
        });

        console.log(statusResponse);

        const statusData = statusResponse.data;
        if (statusData.status === "in progress") {
          setTryStatus(true);
        }
      } catch (error) {
        console.error("Error:", error);
      }
    };

    fetchData();
  }, []);

  const tryAgain = async () => {
    const statusResponse = await axios.get(masterLocation, {
      headers: {
        Authorization: masterToken,
        "x-api-key": CLIENT,
      },
    });
    setPdfStatus(statusResponse.data.status);
    console.log(statusResponse);
  };

  return (
    <div className="App">
      <header className="App-header">
        <h3>COMPLY OFFICE</h3>
        <h1>help</h1>
        <button onClick={() => tryAgain(myToken)}>TRY AGAIN</button>
        <h2>Status: {pdfStatus}</h2>
      </header>
    </div>
  );
}

export default App;