Contrary to some assumptions, . Instead, it is a legitimate system library file associated with Epic Games Online Services . This DLL is used for cross-platform features, friends lists, achievements, and online connectivity within games that utilize Epic’s backend infrastructure—even if you purchased the game on Steam.

Just tried hopping back into Hogwarts Legacy after the new update and immediately got hit with a "ebase.dll missing" error. 😩

An incomplete download or a crash during installation can lead to missing or broken core files.

Immediate fixes (try in order)