Guild Wars 2

So, I’m at the part where Aerin put up the shield and when I use the sun crystal to try and break the shield, it just kicks me back out. I tried using the crystal to push all the way through, to the middle with the small bubble, to the outer shield, etc…All possible ways I can think of and nothing breaks his shield.

Is this a bug or am I missing something?

Need to target the guy, thought I had the same problem as well.