リモートインスタンスからもらった分
gems/aws-sdk-core-2.10.21/lib/seahorse/client/plugins/raise_response_errors.rb:15:in `call'
：
paperclip-5.1.0/lib/paperclip/storage/s3.rb:359:in `block in flush_writes'
：
activesupport-5.1.4/lib/active_support/callbacks.rb:413:in `instance_exec'
：
lib/activitypub/activity/create.rb:89:in `block in process_attachments'
：
services/activitypub/process_collection_service.rb:42:in `process_item'
:
workers/activitypub/processing_worker.rb:9:in `perform'