Calling weapon trail FX from inside Player's blueprint

This asset pack works with custom anim notify states, but I need to be able to change the color at runtime through the character bp so I would like to use it as parented to the character mesh, but I cannot figure out why the effect won’t work. Can someone who is familiar with Niagara tell me why this doesn’t work with this specific system? Here are some screens showing the logic working and how the effect looks when implemented with the custom animation notifies, along with some of the way the effect is assembled.
This is using the system “out of the box”:
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This is how I’m calling for the effect to be used with different notifies so I can address it within the character blueprint:


Simple logic and output showing it is working:

output
The particle system itself:

The only script I can find related to the particle system: