The Mixed Reality Forums here are no longer being used or maintained.
There are a few other places we would like to direct you to for support, both from Microsoft and from the community.
The first way we want to connect with you is our mixed reality developer program, which you can sign up for at https://aka.ms/IWantMR.
For technical questions, please use Stack Overflow, and tag your questions using either hololens or windows-mixed-reality.
If you want to join in discussions, please do so in the HoloDevelopers Slack, which you can join by going to https://aka.ms/holodevelopers, or in our Microsoft Tech Communities forums at https://techcommunity.microsoft.com/t5/mixed-reality/ct-p/MicrosoftMixedReality.
And always feel free to hit us up on Twitter @MxdRealityDev.
Bug Fix for Build Errors in VS
After a lot of research and trying out I finally manged to fix the Bugs that occured for me (here) so I wanted to share what helped me.
I read this article and wanted to try it, but when I checked my VS settings the checkboxes were checked. So I tried to uncheck them and build but it still didn'T work. After that i rechecked them and then finally VS started to download some stuff. After that it finally worked.
TL;DR Check the boxed in Tools | Options | NuGet Package Manager -> General -> Package Restore. If they are already checked, try to uncheck them, rebuild and then check them again and build.
Hope this works for you too