If you encounter bugs or glitches, use the official GTA Online Feedback portal rather than seeking fixes for unofficial files. GTA Online Feedback - Rockstar Games
The filename Grand Theft Auto V-CorePack.zip refers to a highly compressed, "repacked" version of the game Grand Theft Auto V Grand Theft Auto V-CorePack.zip
If you have an original DVD or old digital version, you can download only the crack files (e.g., from GameCopyWorld) without repacking the whole game. If you encounter bugs or glitches, use the