Oh, dear. Thanks for the heads up.
It's a bit embarrassing, but it turns out that we recently shipped out a bug-fix update to the v10 suggestion mechanism via paclet manager update, and that update incorrectly was flagged to go to v9 users as well. The v10 version of the paclet is not compatible with v9, and so it's just completely falling over on your system.
We're in the process of fixing this right now. When we do, we'll post something here about how to force Mathematica to grab the fix ahead of its typical weekly schedule.