mastodon.zunda.ninja is one of the many independent Mastodon servers you can use to participate in the fediverse.
Zundon is a single user instance as home of @zundan as well as a test bed for changes of the code.

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zunda

なんぞ

2022-01-19T00:47:05.429170+00:00 app[web.1]:

@local_follower ||= account.followers.local.without_suspended.first
^^^^^^^
Did you mean? @account
pid=69 tid=3l1w9 WARN: /app/app/services/activitypub/fetch_featured_collection_service.rb:51:in `local_follower'
/app/app/services/activitypub/fetch_featured_collection_service.rb:26:in `block in process_items'
/app/app/services/activitypub/fetch_featured_collection_service.rb:26:in `each'

def local_follower
@local_follower ||= account.followers.local.without_suspended.first
end

このイディオムがruby-3.1.0でだめになったんかな?

や、インデントずれてるけどaccountメソッドが無いんだ。