I've attached two screenshots of errors, did you see them? Or you want full list? Basically its 178 errors and all are about missing namespace, however if I double click on error message from the log - it opens file in visual studio, and this particular error is gone. By clicking on all errors I managed to clear them, but on next build they appear again. The most strange thing that these errors allow me to hit 'Play' from Unity and project starts without errors, they appear only during building.