Problem with radius

Am just trying new stuff to learn from, and I have this problem basically my character cant jump over a box near the wall because the radius is huge so what can I do to fix this? I tried to make the radius smaller but the character falls down.

I will give you my blend file so you can look at the problem, if you can fix it tell me how you did it please.

Attachments

The King.blend (446 KB)