If you are a modder, ensure your ASI Loader is up to date. If you downloaded an "Extra Quality" repack, realize that "extra quality" often comes with "extra bugs." Ditch the repack, grab a vanilla install, and start fresh. Your game (and your sanity) will thank you.
A Cyclic Redundancy Check (CRC) is a mathematical algorithm used to verify the integrity of a file. When a file is created or downloaded, a unique checksum value is calculated. Every time you or the game tries to read that file, the checksum is recalculated; if the new value doesn't match the original, the "CRC check fails". This is the game's way of telling you that a crucial file has become corrupted or was not downloaded correctly. x64arpf failed crc check gta v extra quality
If the launcher thinks the file is fine but it’s still erroring, you may need to force a fresh copy: Navigate to your GTA V installation folder (usually under SteamLibrary\steamapps\common\Grand Theft Auto V Find the file named and delete it. Verify Integrity If you are a modder, ensure your ASI Loader is up to date