The problem is triggered by any account on your home timeline that has a Role associated with it.
That's probably your server owner @doktorzjivago.
Options I can think of are:
Temporarily mute or unfollow @doktorzjivago (use the web UI to do this) until I can release Pachli 2.15.1 with a fix for this.
You can uninstall Pachli 2.15.0, and install Pachli 2.14.0. Your Pachli settings and any drafts will be lost and you will have to recreate them.
This is a bit more involved, but if you have a lot of customisation you might find it worthwhile. This still won't save your drafts.
To do this:
- Temporarily mute or unfollow @doktorzjivago
- Open your account in the Mastodon web UI, and verify there are no posts from @doktorzjivago in your home timeline
- Re-open Pachli, go to Preferences > Lab experiments, and choose "Export settings"
- Uninstall Pachli 2.15.0, reinstall Pachli 2.14.0
- In Pachli, go to Preferences > Lab experiments, and choose the settings you exported earlier
- Unmute or re-follow @doktorzjivago
(all of the above assumes that Google Play will let you install 2.15.0 -- there's a chance, because it put you in the 2.15.0 rollout group -- that it will continue to show you 2.15.0 with no chance to downgrade...)