Kolomikta (Actinidia kolomikta) dry papery leaves

Hi there, not sure if this is the right place to post but i bought this climber 3 months ago and a lot of the leaves have dried right out and it looks a bit sick. I feed it with liquid seaweed regularly and it is growing but these leaves are supposed to be the main attraction of the climber and they dont look too happy, it is plated in a full sun spot thanks in advance.

Paula