Who or what is "Tiger"? In all likelihood, "tiger" is either a username of a repacker, a scene group moniker, or a descriptive tag added by an uploader (e.g., "Tiger version" meaning a particular crack). The ambiguity is telling. Repackers operate in a grey economy of reputation, often anonymous, celebrated by downloaders for their technical wizardry and reviled by developers for enabling piracy. The "bigfile000tiger" error suggests an amateur or rushed job—perhaps the repacker attempted to over-compress the game to under 5GB, breaking a critical archive in the process.
Try running the setup in Windows Safe Mode as an Administrator to minimize background interference from other programs. : bigfile000tiger tomb raider error repack