Perhaps you need to get it used to you before you try to pick it up again. Try just have your hand in his space, maybe when you put food in, move your hand to the other end of the cage, and leave it there for a minute, then two minutes the next time .. a little longer each time.

It is likely that he things you are picking him up to eat him, as a predator would do.

After a while, move your hand slowly around the area, see if he is curious to some closer. Then, NOT the first time, but maybe the third time, pick him up, being very careful. Let him climb on your hand, and explore ...