You may have to provide meaningful information if you hope for meaningful advice.
Could you please post screenshots with the pertinent Panels (Toolbar, Layers, Actions, History, Options Bar, …) visible taken before starting the Action and at the point of failure?
If something »is not available« in an Action it often refers to a condiction for a process not being met.
For example a Filter cannot be applied if nothing is selected, a Selection Modification cannot be performed if no Selection exists, …
I assume the Fade would be invoked after a Filter has been applied, so what is the exact and complete situation at the point of failure?