If I copy that content and create a Web Template and then use it for a Web Page there is no liquid error (i.e. steps 1 -3 on the link you provided and then hooking the Page up on the portal and viewing) - the Portal I have setup is the Blank/Custom Portal.
Edit: I did have an error showing in the footer
The format of the snippets is not correct e.g.
{{ snippets[Footer] | liquid }}
should be:
{{ snippets['Footer'] | liquid }}