Uncaught (in promise) TypeError: Request failed on load

[gavmck]

I've just updated a site I'm using upup on and it's throwing the error Uncaught (in promise) TypeError: Request failed in upup.sw.min.js

I can't see why it's erroring as there's no trace and the JS is all minified.

Any ideas?

Chrome 57 on Mac OSX

[schornio]

+1

[isocroft]

+1

I just realized this morning that ajax upload progress listener/handler were not working because of service-worker fetch implementations

See: https://github.com/w3c/ServiceWorker/issues/1141

Could this be connect to this issue ?