I am still using Timeshift and the problem has fixed itself with a fresh install on a new machine, without me knowing what the problem was in the first place.
Here, libsmartcols1 is on 2.37.2-1. Just checked Timeshift. Automatic snapshots stopped August 19th. When I open Timeshift, I get the same message as you. So yes, it is broken for me as well. Thanks for noticing. I will add myself to your issue on GitHub.