Honkai Star Rail and Zenless Zone Zero are available on various platforms and services, including the Epic Games Store.
Recently, EGS users encountered technical issues — they couldn't donate, and they couldn't log into the game either.
miHoYo (HoYoverse) quickly fixed the problems but did not offer compensation (it is often given for bug fixes) — some fans were unhappy with the lack of free Stellar Jade / Polychromes.
Soon, Genshin Impact players began to encounter a similar problem. miHoYo explained that the problems were related to Sony services:
Due to an error in PlayStation Network services, some Travelers were unable to top up their accounts. Server operation has been restored. Top-up services have been resumed.