"This copy of the Install macOS Mojave application is damaged, and can't be used to install macOS."

Hey everyone, I have been following the guide https://youtu.be/fA9AotXqkqA to install Mojave on a fresh hackintosh dedicated build (gigabyte motherboard, sapphire 570 ) When I click install macOS from the macOS Utilities screen I get this error message. I have already tried doing the whole process again with the same USB stick.

Any ideas? I am downloading Mojave from the app store, latest version.