The 1.0.2189 update, known as the Cayo Perico Heist update, introduced significant changes to the game's internal structure. For modders, this meant that older configuration files were no longer compatible, leading to instant "Initialization Error" messages or crashes when trying to add new DLC vehicles. Why You Need a Custom Gameconfig

Increases the total memory available to the game.

Not all configs are equal. Depending on your mod list, you need a specific variant:

Below is a guide on how to install and optimize the for limitless vehicle mods. Why Do You Need a Custom Gameconfig?

If it crashes during the loading screen, check your launcher.log in Documents\Rockstar Games\GTAV to see exactly which file triggered the error.