Error in build universal 8.1 (net core)

Unity
1

On windows 10 VS 2015 build x86:
ERR: Unable to load dll fmod: the specific module could not be found. HRESULT 0x8007007E
DLL exists in the folder. Build ARM ok.
Why?

2

fmod(Metro/x86) depends on phoneappmodelhost.dll, but phoneappmodelhost.dll only for winphone

3

On Unity we only support windows phone 8.1, not 8.1 universal.

Windows 10 Universal support will be added to Unity soon.