I have been trying for the past three days to submit an app but can't upload my screenshots. I can do one or four at a time and eventually one gets stuck and I have to reload the whole page. It never submits and after letting it sit there over night it said something happened during submission. This is happening on a Mac with Chrome and Safari with cookies and cache cleared.
Looking at web tools I am getting a 500 error and Javascript error on an image every once in a while.
TypeError: Cannot read property 'toLowerCase' of undefined
at appVersionController:4837
at vendor.js:16
at i.promise.then.l (vendor.js:17)
at i.promise.then.l (vendor.js:17)
at i.promise.then.l (vendor.js:17)
at vendor.js:17
at k.a.$get.k.$eval (vendor.js:17)
at k.a.$get.k.$digest (vendor.js:17)
at k.a.$get.k.$apply (vendor.js:17)
at f (vendor.js:16)