Unable to use RNFS to read a file despite providing an absolute path

I'm trying to follow the 'Usage' example in this repo: https://github.com/rhdeck/react-native-coreml

So my code is fairly similar:

const coreml = async (pathToImage: string) => {  try {    const {jobId, promise} = RNFS.downloadFile({      fromUrl: NetworkMLModelPath,      toFile: `${RNFS.DocumentDirectoryPath}MobileNetV2.mlmodel`,    });    await promise;    console.log('jobId', jobId);    const [{name, path, isFile, isDirectory}] = await RNFS.readDir(      `${RNFS.DocumentDirectoryPath}`,    );    console.log('name', name, 'path', path, isFile(), isDirectory());    const modelPath = await compileModel(path);    // const {label, confidence} = await classifyTopValue(pathToImage, modelPath);    // console.log('The image is a '+ label +'. I think. ');  } catch (error) {    console.log(error);  }};

And my output is

 LOG  jobId 1 LOG  name MobileNetV2.mlmodel path /var/mobile/Containers/Data/Application/4A549020-958B-4B83-99EE-782E4DAAEA9C/Documents/MobileNetV2.mlmodel true false ERROR  TypeError: null is not an object (evaluating 'RNCoreML.mainBundlePath') LOG  [TypeError: undefined is not an object (evaluating '_$$_REQUIRE(_dependencyMap[6], "react-native-coreml").compileModel')]

So my RNFS.downloadFile() seems to have worked since I have a jobId, but I don't have a path to my file since my file "doesn't exist". Any help or suggestions would be appreciated!