Corrupted local Steam files can prevent the client from communicating correctly with the game.

, the most effective solution reported by the community is deleting the ClientRegistry.blob file from your Steam folder. This forced refresh of Steam's core files often resolves the false detection that the client is inactive. Primary Fixes for "Steam Must Be Running" : Close Steam completely.

This is a "pro tip" for older Capcom titles on Steam. It forces the game to recognize its own ID.

’s reboot is giving you the cold shoulder, here is a breakdown of the most effective community-verified fixes to get you back to demon-slaying. 1. The "ClientRegistry.blob" Trick