I ultimately found the solution by reading this post: https://community.shopify.com/c/shopify-apis-and-sdks/full-process-for-uploading-files-to-the-files-api/m-p/1616396#M80572My issue was that I was not passing the required headers for the request t...

I had a similar issue in my app, which turned out to be the missing headers. const headers = { ...formData.getHeaders()}; Thanks for sharing your gist, helped me solve my issue. 

I am following a number of resources on the Shopify documentation website and blog around using the `stagedUploadsCreate` mutation to create a staged URL, however, once I try and use the staged resource URL in a later `productCreateMedia` mutation, t...