The official uploader UI (React included version) gives "A network error" on each upload try.
What happens (as seen in the dev tools) is: it starts the upload, makes a call to
with file size, gets 404 (file not found BECAUSE IT WASN'T UPLOADED YET) and decides it's a network error.
I changed a line in the uploader source code from
in the upload function.
And now it meets a network error after the upload is finished. (The file is not uploaded anyway)
Uploader is at version 1.0.2