HOW DO I FIX THE POCKET ZIPPER?

You need to manipulate the pins into position one by one.

Not all the pins can move into position at once. Other pins are in the way.

Move the top right pin first. Now the one next to it is free to move.

Now move either the remaining top pin or the bottom right pin.

Move the last pin, and you're done. Tap the pocket to search it.