A bugfix to the cloud compiler that went out 1 week ago has been causing some code that used to compile with the cloud compiler to now have errors. It affects code that has preprocessor definitions (
#define) at the top of the file.
A fix is in the works and should go out early next week.
As a workaround you can add
#include "Particle.h" to the top of your file.
Thanks for everybody who reported issues with the cloud compiler. It helped me figure out where the issue was.