With Horizon Zero Dawn update 1.04 today, Guerrilla Games has fixed numerous issues with main quests and side quests, an issue with the exploration music dropping out after playing for a long time, an issue with Aloy getting stuck in her sliding animation, and more.
Here’s the full list of patch notes for the new update:
Fixes
Main Quests

Fixed an issue in ?The Proving? where one of the attackers would fall down the slope.
Fixed an issue in ?The Womb of the Mountain? where the spear would not be in Aloy?s inventory if players opened a treasure box with a DLC item before retrieving Aloy?s weapons. Note: Players who have already encountered the issue will need to reload from a game saved prior to this quest.
Fixed an issue in ?A Seeker at the Gates? where players would be able to enter the gates of Mother?s Watch when fast-traveling to this location. Fixed an issue in ?A Seeker at the Gates? where the quest objective would not update from ?Go to the Carja Border Fort? to ?Kill the corrupted machines?.
Fixed an issue in ?A Seeker at the Gates? where players could not progress through the Carja Fort.
Fixed an issue in ?The City of the Sun? where Erend wouldn?t spawn after the dialogue with him ended if players rushed past the civilians on the bridge.
Fixed an issue in ?The Sun Shall Fall? where players couldn?t return to Dervahl if they fast-traveled during the objective ?Talk to Dervahl?.
Fixed an issue in ?The Grave Hoard? where skipping the conversation with Sylens...