Hi , I tried the upload too and i have error "file xxxxx not received" message too ... I tried on my production server wich is 2.9.0.283 and on my development pc 3.0.0.0 Both Edge and IE11 gave the same result
My other concern is also related to Win10 - Edge/IE11 i do a have an xls report and i call addtoinitproc to show/download it and instead of receiving it as a .xls Edge and IE11 receive it as a .zip !!!!