Problem favoriting a tab (no replies)

Hi,
I am trying to favorite this tab:

[harptabs.com]

When I go to my favorite list, I see the title, but when I click on it, it takes me to this page:

[harptabs.com]

Am I doing something wrong? Any suggestions?

Edit: I just checked and it is happening to every song I favorite. I see the correct title, but they take me to the same blank page.