This usually means your game version is newer than the Script Hook version. You will need to wait for Alexander Blade to release an update (usually takes 1–3 days after a game patch) or "downgrade" your game version.
The installation process is straightforward, but precision is key to avoiding crashes. script hook v 1.0335.2
Most downloads come with a default "Native Trainer" that allows for skin changing, teleportation, vehicle spawning, and time manipulation. This usually means your game version is newer