1105 - Path not allowed for '%s' ('%s').

Description
A path was provided for a property where a file is expected.
Example
Config:
Copy { .Source = 'Code/' // This should be a file .Dest = 'tmp/' }
Output:
c:\test\fbuild.bff(1):(1) FASTBuild Error #1105 - Copy() - Path not allowed for '.Source' ('c:\test\Code\'). Copy ^ \--here
Fix:
Copy { .Source = 'Code/file.dat' .Dest = 'tmp/' }