Follow these solutions in order. Stop when the error disappears.
This is the standard fix for Steam or Epic Games Store users. It forces the launcher to check for corrupted data and redownload only the damaged files. bigfile000tiger tomb raider error
To confirm the nature of the error:
Even Windows Defender can cause this. Open Windows Security → Virus & threat protection → Protection history. Look for any blocked or removed items related to .tiger files. Follow these solutions in order
Find and delete bigfile000.tiger (and any other .tiger files mentioned in the error). bigfile000tiger tomb raider error