Guild Wars 2

There’s an event after the Eye of Zhaitan boss in Straits of Devastation that you have to lead the NPCs out of the catacombs.
When this happens, the east entrance is blocked by rocks and the west entrance is closed by a gate, which you have to find the gatekeeper (inside the catacombs) to open it.

Now, the event is stuck in Tarnished Coast server, I tried getting in from the west, gate closed, tried from the east, tunnel collapsed, so how can I complete the event so the event can reset?

There is another entrance on the east side that is further south. It should be the same place where the NPCs enter the catacombs when doing the event from the earlier part of the event.

That is the East Entrance that I spoke of, and there’s debris in the entrance blocking it.
The other one I know of is where the NPCs escape through (gate closed).

I’ve been looking for another entrance but unsuccessful so far…

There are a total of 3 entrances.
One is the exit for that event.
One can become blocked/where the gatekeeper is located
One at the red circle in the picture.