Oh ok, you have an error when compiling... the script you assigned to your project (to your Power Up 00) use a sound, and you don't have that one declared.
So, to fix this error, you need to add a new SFX label, in the "Sound > SFX" section of NESmaker, and name it "SFX_INCREASE_HEALTH" (it's ok, if you don't have any real sound for it, yet). It just need to be declared here.