1101 - Missing required property '%s'.

Description
An attempt was made to invoke a Function, but a required property was not set.
Example
Config:
Alias( 'name' ) { }
Output:
c:\Test\fbuild.bff(1):(1) FASTBuild Error #1101 - Alias() - Missing required property 'Targets'. Alias( 'name' ) ^ \--here
Fix:
Alias( 'name' ) { .Targets = { 'MyLib' } }