Hi AkangGG,
You will need to make sure that your Material has this enabled in the attributes for use with Dynamic Emissive. You will also need to make sure that you have a Directional Light in your scene with Dynamic Indirect Lighting enabled.
Also, make sure that you’ve enabled r.LightPropagationVolume=1 in the the ConsoleVariables.ini file in your engine installation folder.
You will also want to add a Post Process Volume that is unbound so you can adjust the LPV properties for a better look. You can test to make sure that you’ve enabled LPV by using the Show > Visualize > Light Propagation Volume flag.