Updating a 1.5 site

I am aware that the new 5 update will not work for the 1.5 sites, but when trying to update to the 3.9 I am receiving this error message: http://prntscr.com/7ye931.

And without the update we are unable to use the Facebook autoposting because when signing in we receive a No Data Error. Is there an update for the 1.5 that will allow us to keep using autoposting on 1.5 sites?

Please let me know what we can do to fix this!
Thanks!
-Sadie