SureAI

I'm at the main quest "Part of something momentous Part 2" and I'm currently stuck. Right after the incident with the crazed man in the woods when dunwar kills him, we arrive at the altar, the sigil master tells us the light-born are dead, and after some arguments, asks us to drink our potions.

My character does so, then passes out, and as the screen is fading to black...... the game just freezes and crashes. I've tried reloading, but its just not working.

Can someone help me? even if its just a console command to advance the quest to a next stage?

Have you a lot of clutter in your inventory e.g. arrows? Remove them and then try to drink the potion. See if it is still freezing.

Upload your savegame. Savegames are located here: documents\mygames\skyrim\saves
A savegame consists of two files: one .skse file and one .ess file (please zip them together)
Thanks.

Dropped arrows and the crash still happened. Apparently, it was the pennies. I dropped all my money on the stash, tried again and this time it worked.

Well this would have been my second guess. Thanks for the report. But the issue is already known. Merged into another thred.