Your anki dont seems to be 2.1.49 otherwise would appear to enable v3 scheduler, not v2
You can check your version by finding about/about me in your anki
Updating to the latest version would fix your problem Releases · ankitects/anki · GitHub
Another thread for the problem "Anki Client does not support the new timeline zone.." - #2 by dae
In case you are a linux user
Linux Distro Packages - Anki Manual
Install & Upgrade - Anki Manual