My dynamic material instance do not work?

In your Create Dynamic Material node the Source Material node is empty so there is no material to change.

Its scrips do not working, isee a tutorials and i dont know why is not changing the colors like this, Architecture Real-time - Unreal Engine 4 Archviz - YouTube , help me please. this is the blueprints i use.

i put a material in source material and i shows the material, but i dont want this i want when you click the ball shows me a hud to change colors

Can we see the material?

Also have you verified (like with a simple print string) that the setColor is what you expect on tick?

You do not need a source material assigned if you want to use the material on the mesh already. The source material slot is only if you want to make a material instance dynamic from a new material not assigned to the mesh.