Hi,
Trying my luck here, after googling with no good finding. So I'm trying to add a step in my DevOps Build Pipeline :

So currently I have a small error (well it is a starter step, I bet there will be many more, lol) saying "##[error]The version is in an invalid format. Version: 1.1.$(Version.Revision)"
So based on the picture, I created variable before I put the steps like this :

Anyone can help what's wrong with it? I hope there is no silly mistake like typo error.
Much thanks.