This bug is that new project name be set to ‘HelloTOW’ and svn repository be set to ‘C:\\TOW\\SvnRepo\\Projects\\HelloTOW’.
So, to fix this bug, after adding new project, you must edit trac.ini like above.
name = MyProject
repository_dir = C:\\TOW\\SvnRepo\\Projects\\MyProject
And, resync your svn repository.
C:\TOW>trac-admin MyProject resync