I know Bungie said to restart the mission and play solo. Also cleared my cache and everything still nothing i have done everything Bungie suggested and still not working. I have done the solo and restart the mission about 10 plus times or more and haven't teamed up with anyone or anyone who has it completed. and have reset the checkpoint thing too but once I get to the prismatic pool to commune with it. The interact option disappears. This needs to be fix cant progress past it otherwise its a waste of money paid for a expansion that doesn't work. cant even move on to the next part of the campaign. Bungie really needs a better support structure and response. forums are nice but what is needed is a report option either in game or on this site for bug only so there testing team can look into them.