This is because you are using an old version of svnversion.
Try opening a command prompt, go to the svnversion directory and do the same work as MSBuild.
CMD:
cd C: \ ProgramFiles \ TortoiseSVN \ bin
[ENTER]
svnversion C: \ VisualStudio \ Projects \ YourDirectory
[ENTER]
SVNVERSION should answer why its not working, in my case was by E155021: This client is too old to work with thew working copy at ...
source share