DankGhost

Alright put the bug in the hub instead of trouble shooting. It seems that doing the puzzles out of order, Statues then Dusknoir made Venam's trial not open up, hoping that this could be fixed eventually.

Alright managed to revert to an previous save and do the Dusknoir Puzzle first, and it seems to have worked. I guess this is a new bug.

I have freed Venam's friends, Statue Puzzle, then Dusknoir Puzzle. I went to the Venam's Trial, the sign said that the trial will unlock once I finish both of the other two, even checked on YouTube that you were meant to start a cutscene as soon as you walk in, but nothing happened, did I do something wrong? Did doing the trials out of order cause a bug, has anyone have this happen to them before?