THREE.js Model-Loading Issues - three.js

Question

I’m trying to load some 3D models from a remote URL into my page and I’m suddenly getting this error over and over again:
SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data
The models I’m working with are those available from THREE.js’s GIT - here - so they’re all perfectly good legit models that we’ve all been using for years. In other words: they don't contain any unexpected character anywhere.
What’s weird is that during development of this project, I first just downloaded these models (the ".gltf" and ".glb" files) directly to my hard drive and loaded them into my page from there - and my code worked perfectly. But as soon as I uploaded these very same models to a remote server and tried to load them from that URL, I suddenly started getting this error.
Here’s my loading function:
function loadModel(modelFileName) {
console.log("->In 'loadModel()', 'modelFileName' =", modelFileName);
// Load the Object:
gltfLoader.load(modelFileName, function(incomingScene) {
console.log(modelFileName, "' has arrived!!!");
console.log(" =>'incomingScene' = ", incomingScene);
let loadedScene = new THREE.Scene();
loadedScene = incomingScene.scene;
scene.add(loadedScene);
const defaultTransform = new THREE.Matrix4()
.multiply(new THREE.Matrix4().makeScale(0.5, 0.5, 0.5));
loadedScene.applyMatrix4(defaultTransform);
},
// Called when loading is in progresses:
function(xhr) {
console.log( (xhr.loaded / xhr.total * 100) + '% loaded' );
},
function(error) {
console.log("ERROR! -->", error);
});
}
Here’s the URL where one of the models I’m requesting is sitting:
https://ipfs.io/ipfs/QmYqwNYxqmu4z39emTo7h9D62rbwm1esAmbAf2PctAyUvu?filename=Flamingo.glb
(This particular model was actually loading just fine when I ran the app/page the first couple of times - but then it suddenly stopped loading and gave me that error I listed up top. Makes no sense.)
The only output I'm getting from the browser's JS Console regarding all this is from the progress callback bit of the code I posted above, which just says:
Infinity% loaded
Any ideas what’s causing this - and how it can be solved?
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UPDATE:
here's a screenshot of the NETWORK tab in the my browser: