The release of 1.0.877.1 followed the standard pattern for Script Hook V's creator, Alexander Blade Game Update : Rockstar releases a new patch. Mod Breakage
: This error occurs if your game has updated past 1.0.877.1. You must either update Script Hook V to the latest version or downgrade your game files. Online Mode Warning Never go into GTA Online with Script Hook V installed. Script Hook V Version 1.0.877.1