It failed several times now. I also tried with imgur, same error, different url. http or https makes no difference. But I will try again periodically.
Don't you just use curl? From my experience that's the approach that always works for everything, as long as you can set allow_url_fopen to On in php ini, perfectly working example:
oh shoot o.o sry, i didnt see that. maybe I should not work till midnight. The bugs tag gets already saved on upload, PR for frontend display is on the run. It's no issue, it's simply not implemented yet