Solution to macos high sierra application is damaged and can‘t be used to install macos error

Solution to this error : This copy of the install macos high sierra application is damaged and can‘t be used to install macos

[Dannyapexx]

Thanks man, i have solved the problem

[choupa_ceo]

thanks a millions you saves my computer bro

[jeffchambers]

I still get the same problem no matter what date I change it to. I have tried to change it to 2018, 2016, 2014 still the same problem. Not sure what else to do