If the general Blizzard cache doesn't work, specific local settings or map data within your user documents might be corrupted. Navigate to your folder.
Find the folder and delete it (or move it to your desktop to back up your replays). sc2 download cache error
Errors like CLIENTSIDE_CACHE_READ_BAD_HASH are often connection issues disguised as cache problems. If the general Blizzard cache doesn't work, specific
Shut down your PC and restart your modem and router to refresh your ISP connection. sc2 download cache error
Relaunch the game. Note: If Arcade or Chat features seem broken after this, simply starting a campaign mission briefly can force the game to re-sync. 2. Delete the StarCraft II Documents Folder