I recommend putting a small radius on the tip of the snap that has the 45 degree sharp point and the same small radius on the 90 degree corner at the bottom of the lines in blue if you want to simulate the snap going around the corner.

Don't put any edges in the contact set that will never make contact such as the left and bottom red edges.

Finally, increase the pinball radius until you get closure.

It is better to start a New Discussion once you mark an old discussion with Is Solution. Also, shorter discussions are easier to read than long ones.