Why my app cannot show 3D View?

I build an 3D app,while it shows a 2D View

Error log has been uploaded.
some key errors are as follows:
“Hololens.exe”(Win32): Unloaded “U:\Users\DefaultAccount\AppData\Local\DevelopmentFiles\HololensVS.Debug_Win32.Administrator\HolographicStreamerDesktop.dll”
“Hololens.exe”(Win32): Unloaded “U:\Users\DefaultAccount\AppData\Local\DevelopmentFiles\HololensVS.Debug_Win32.Administrator\PerceptionRemotingPlugin.dll”
Failed to load 'PerceptionRemotingPlugin', expected x86 architecture, but was Unknown architecture. You must recompile your plugin for x86 architecture.
(Filename: C:\buildslave\unity\build\Runtime/Misc/Plugins.cpp Line: 183)
Holographic library PerceptionRemotingPlugin: Failed to load dll
(Filename: C:\buildslave\unity\build\Runtime/VR/HoloLens/HolographicEmulation/SimulationRemotingApiFuncs.cpp Line: 47)
Can't create HolographicSpace because PerceptionRemotingPlugin is not loaded!