Hello @JewelH20 and welcome to Discussions.
I am sorry to hear you are unable to interact with Sigurd to start the quest "Where Legends Are Born".
Could you please confirm that you defeated all Order members (except the Father)?
Please ensure your game is fully updated.
Should the issue persist, please send us a video of the issue and we will be happy to investigate further.
Please let us know if we can be of any help.