Cannot progress through "Beyond" quest for Shadowkeep campaign
Hello, just want to report an issue/bug and am seeking assistance if possible. Am currently doing Beyond quest for Shadowkeep and have gotten inside the Pyramid but it seems that it doesn't progress. There's no NPC conversations being triggered and no proper waypoint update in the radar, the waypoint in the radar just remains in the entrance outside where you also start the quest.
I've also tried exploring the whole pyramid and got to the point where I interacted with the artifact (last step of the quest supposedly) but still, nothing happens.
To add, the one miniboss (near the entrance) is the only enemy I saw in the whole pyramid. When I try to attack him, he is immune. Kindly help address this issue. Thank you very much.
See screenshot of the immune boss here: