Issue with Google Chat

Ok, I installed and enabled the module and flag friend, I then enable the flag. I then went to configure google chat on the configuration page and at the bottom of the page is (I’m trying to remember) a set of radio buttons for how to flag friends. I chose the second option and hit save. At that point my site went “unavailable.” When I try to navigate anywhere it says “The website encountered an unexpected error. Please try again later. “

Drupal 7.4.4

Please help!!

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