webgl exception

hi,
i started a testscene with just 2 spheres and an unlit material. on webgl-export i get the compiler error:


Internal compiler error. See the console log for more information. output was:
Unhandled Exception: System.Reflection.ReflectionTypeLoadException: The classes in the module cannot be loaded.

at (wrapper managed-to-native) System.Reflection.Assembly:GetTypes (bool)

at System.Reflection.Assembly.GetTypes () [0x00000] in <filename unknown>:0

at...

webgl exception