I think I have mentioned this in other threads on this topic. I have found the best thing is not talking about it. A block or a fear, and I do think they are different.
For my DD, a fear won't let her even GO for a skill. She developed a fear of giants after already having them, because her grip slipped and the whole thing went wonky. She did not get hurt, in fact, she was over the pit. But, this happened after she broke two bones in her leg mislanding her tsuk. So, at this point she knew VERY KEENLY how dangerous gymnastics can be and how even in a safe environment where you are prepared, things can go wrong.
She would not even attempt anything remotely like a giant, baby giant, etc. for at least 4 months. I NEVER asked her about it, and her coach never asked her to train anything for the giant either. I didn't know if she would ever try it again and I didn't care. At some point, she started doing long hang kips over the pit bar. Over several months, she moved them to baby giants and periodically she would tell me that she was getting more distance between her body and bar. Then it became "I am doing really good baby giants." Then is was "I am straightening my arms, my tap is good, my casts are getting better."
I never asked and even when she told me things, all I ever said was that's great and I am so happy for you...keep it up. DONE. Still in all of this time her coach never asked her/told her to go work baby giants or anything. He would give her corrections based on what he saw, but working giants was never an official part of her bar workout.
Well, after 3 months of her working it when she wanted to, as she was comfortable, she officially has he giant again on the pit bar.
I have found that my talking about skills or challenges has to be kept to the minimum. I do not bring anything up, yet we might have a very robust conversation about what she is working on - she has to be the one to bring it up. And still, during the conversation, I tell myself "ok, that is enough, time to change the subject."
Backing off, both parent and coach, has been the BEST thing for her.