Pachli 2.1.1 is now available. This fixes one bug; if you were upgrading to Pachli 2.1, and you included trending tags, links, or posts in your tabs, Pachli 2.1 would crash when starting, and you had to remove and re-install the app.
Thanks to Rainer Müller for the detailed bug report. This was fixed in #330
Download Pachli 2.1.1 from Google Play, F-Droid, or the GitHub release page.