https://www.gamespot.com/articles/new-horizon-zero-dawn-update-out-now-see-the-patch/1100-6455217/

A new patch is out now for Sony's Horizon: Zero Dawn, containing fixes for problems that came up in the new expansion, The Frozen Wilds, and more. Before going any further, be warned that the patch notes contain potential spoilers for Horizon and the expansion.

Specifically, this new patch fixes a problem where campfires would fail to stay lit in The Frozen Wilds, while it also clears out an issue that prevented players from creating a New Game+ loadout. Also fixed with this patch is a problem where two datapoints could not be obtained in The Frozen Wilds, while several problems related to "graphics" are fixed as well. Additionally, some dialogue and subtitles problems are fixed, while some cutscenes and animations have been improved for The Frozen Wilds.