Error running AutoML Edge model with tfjs-node - tensorflow.js

Question

I am still very new to Tensorflow but when trying to run an AutoML Object Detection edge model with tfjs-node I run into this error.
Error: Session fail to run with error: Unknown image file format. One of JPEG, PNG, GIF, BMP required.
[[{{node map/while/DecodeJpeg}}]]
I cannot figure out why Tensorflow is throwing this error when I have checked the string is a JPEG in Base64. To further elaborate this was the example I was following but had to deviate as I was getting errors about inputs needing to be image_bytes and key.
import { readFileSync } from 'fs';
import { node, scalar } from '#tensorflow/tfjs-node';
const model = await node.loadSavedModel("[model directory path]", ['serve'], 'serving_default');
const input = readFileSync("[image path]", "base64");
const output = model.predict({
image_bytes: scalar(input).expandDims(0),
key: scalar("").expandDims(0),
});
const scores = await output['detection_scores'].arraySync();
const boxes = await output['detection_boxes'].arraySync();
const names = await output['detection_classes'].arraySync();
output['detection_scores'].dispose();
output['detection_boxes'].dispose();
output['detection_classes'].dispose();
output['num_detections'].dispose();
console.log(scores);
console.log(boxes);
console.log(names);
EDIT: I've found the file in Tensorflow that throws this error but I am still unsure of how to fix it as I am not familiar with C++.