Installing demo templates on a CMS6 site fails with error message: "You cannot call a method on a null-valued expression."
OS is Windows 7, Installing a new CMS 6 site with public templates worked fine. Seem to be related to the xml update part of the installation:
I have the same issue...
Installation will fail if your sitename contains spaces - support has been informed about the issue.
I have the same issue, but when installing an EPiServer CMS R2 site with Database - without templates.