From Guerrilla “Our team has been working on a patch that addresses several issues with Horizon Zero Dawn Complete Edition for PC, which is available to download now.
Were very grateful for all the reports and posts from our players so far! Some issues still need more investigation and testing, so our team is hard at work on the next patch which will go live next week.
If you are experiencing issues, please continue to send us your crash reports; additionally, you can go here to report any other problems you might encounter.”
Source: N4G PC Horizon Zero Dawn Complete Edition for PC – Patch 1.01 is now available