She feels she has had trouble clearing her house and partner using the Lightworker Healing Protocol because her kids are still seeing things, and she awoke recently to see a “black being” hovering over her and her child. What was the reason for this?

This was a spirit presence, a spirit meddler energy. It was indeed menacing her but unable to gain a foothold in her energy. So she is being protected and need not doubt her ability to use the Protocol effectively. It is still prudent for her to do an outreach to you at this early juncture, particularly as her family needs her help to maintain safety and protect the children especially. This she will be able to do and will continue amplifying previous work and what you have done for her as well. So she is off to a good start now, and things will go well from here if she maintains vigilance.