After I re-installed Sabre, I tried to go in and manually authorize my existing users. However, I'm getting these error messages:
1) When trying to do all users, "0/<x> WordPress users successfully registered." (Where x is my number of users).
2) When trying to do one user, "Unexpected SQL error. Current operation failed."
I even tried adding a new user by hand into WP, and then manually adding the user in Sabre... still no luck. Any ideas?