Install macOS Mojave application damaged - macbook pro 2015
I am trying to install Mojave on my macbook pro 2015 currently running Sierra.
I have downloaded (twice) the Install file from the Apple store, but when I launch it I get this error:
This copy of the Install macOS Mojave application is damaged, and can‘t be used to install macOS.
Any advice about how to overcome this error and install Mojave?
Thanks!
MacBook Pro 13″, macOS 10.12