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If you go to Valhalla again and Njord's not talking, and Jormungandr's Lair is not showing up in your Njord map, you'll have to contact Support.
From your game screen, choose the Settings cog (upper left or right corner). Make a note of your Player ID. Then choose the Support button. Choose a category from the bottom half of the screen.
Don't enter something in the text box at the top of the screen. That just sends your entry right back here to the player forum.