Whenever I try launching Timeshift, I see the prompt to enter my root password, and then nothing happens. If I look in the journal, I see this error :
> Aug 21 18:52:28 archlinux pkexec[11342]: tcoude: Executing command [USER=root] [TTY=unknown] [CWD=/home/tcoude] [COMMAND=/usr/bin/timeshift-gtk]
> Aug 21 18:52:30 archlinux systemd[1104]: app-cosmic-com.system76.CosmicAppList-11371.scope: Couldn't move process 11371 to requested cgroup '/user.slice/user-1000.slice/user@1000.service/app.slice/app-cosmic-com.system76.CosmicAppList-11371.scope': No such process
> Aug 21 18:52:30 archlinux systemd[1104]: app-cosmic-com.system76.CosmicAppList-11371.scope: Failed to add PIDs to scope's control group: No such process
> Aug 21 18:52:30 archlinux systemd[1104]: app-cosmic-com.system76.CosmicAppList-11371.scope: Failed with result 'resources'.
> Aug 21 18:52:30 archlinux systemd[1104]: Failed to start Application launched by COSMIC.
Whenever I try launching Timeshift, I see the prompt to enter my root password, and then nothing happens. If I look in the journal, I see this error :