Fire model - flames not working - can anyone help please?

I have a new model with moving fire. The property isn’t working, and I can’t see where to adjust it.

I have emailed the creator, so hoping he replies asap. The model is:

https://www.unrealengine.com/marketplace/en-US/product/hell-ifrit-inferno

My flames aren’t appearing, as you can see by my screen hot here.

Any help would be much appreciated! Thanks.