However, if you are connecting to a private legacy realm (such as SlashDiablo, Project Diablo 2 legacy servers, or similar emulated environments), this file is likely a mandatory dependency generated by their launcher.
"Patching cannot be completed because the patch archive is corrupt. File name: D2XP_IX86_1xx_114d.mpq"
The file is almost certainly a to verify game integrity or inject custom code necessary for connecting to private realms.
The file d2xp-ix86-1xx-114d.mpq might appear to be a cryptic string of characters at first glance. However, its importance in the world of Diablo 2 and its expansion pack, "Lord of Destruction," cannot be overstated. As a key component of the game's architecture, it serves as a bridge between the base game and the new content introduced by the expansion.