If you have FreeArc installed:

Here’s an informative review of the error message — including its common causes, how it relates to broken links or incomplete downloads, and troubleshooting steps.

Sometimes, a file is labeled .arc but is actually a different format. This often happens with "Split Archives."

If you are certain you have the correct software and the file structure is correct, the archive is likely corrupted.

If the error persists, one of the downloaded bins might actually be corrupt. Open your Torrent client (e.g., qBittorrent). Right-click the game download and select