Musicbox on raspberry pi model A

Why won’t musicbox start on a raspberry Pi 3 Model A. I only get a 4 color startscreen and that’s all.
I downloaded the latest release (0.7.0 RC6)

That’s the new raspberry pi version isnt it? Our latest release probably doesn’t have the required firmware to boot that model. If you have another model you can use that to boot and upgrade the firmware, then put it back in your model 3A.

Failing that, I’ll release a new updated verison on Friday.

Thanks for the quick reaction.
I have tried to update but half way it came with faults Error writing output file (28: no space left on device)