I got a new Roku Streaming Stick+ and it updated itself to the latest version and almost everything works as expected. The screen mirroring from Windows 10 (2 laptops tested) is not working at all.
I followed all suggestions posted here and elsewhere on the internet without any luck.
So, I suspected that Windows 10 may be the problem. I tried screen mirroring with Amazon Fire Stick 4k and it works just fine so I have to to exclude Windows 10 (which by the way, I installed the latest updates for Network adapter and display).
The Roku Stick+ is detected and listed as a display in Windows 10 but when attempting to connect it fails after some time with the message: Can't connect.
At this time I put the blame entirely on Roku Stick+. Anyone having success with the same configuration?