Hey everyone,
I recently started the "Epilogue" quest after killing Alduin.
I speaked to Tsun, who tought me a Thu'um and then returned to the Throught of the World.
After I talked with Paarthurnax he flew away with the other dragons.

Here's the problem:
When Odahviing lands, he immediately attacks me.
Even fighting back is useless because his life doesn't drain.

I don't know what to do. I need him to talk to me so I can finish the quest but all he does is attacks.
I tried loading from an earlier save but he does the same.

What can I do to finish the quest?