I reset preferences - it did't help me.
I tried to run FCPX using the Terminal:
PGLMasterCGLPixelFormat(): Framebuffer is 8 bit
PGLMasterCGLPixelFormat(): Successfully allocated an 8 bit pixel format
PGLMasterCGLPixelFormat() -- CGL reports there are 1 virtual screens for this CGLChoosePixelFormat
Unable to find filter reference documentation "".
Unable to find filter reference documentation "".
Unable to find filter reference documentation "".
Unable to find filter reference documentation "".
Unable to load PlugIn: com.apple.InternalFiltersXPC due to error: 4097, Couldn’t communicate with a helper application..
Unable to load PlugIn: com.fxfactory.TimecodeXPCService due to error: 4097, Couldn’t communicate with a helper application..
abort sudo /Applications/Final\ Cut\ Pro.app/Contents/MacOS/Final\ Cut\ Pro
It's not help me too