The error “this clip requires the actor to have the ‘Renderer’ component”, basically means that the Actor assigned in the Actor group where this clip is used, needs to have a Renderer component attached, like for example, a Mesh Renderer or a Skinned Mesh Renderer.
In regards to your edit, can you please clarify what you mean by saying that “I get the variable wasn’t assigned of my passed in texture” ? I am not really sure I understand what you mean, sorry 🙂 Can you also please post your custom action clip as well?