今天早上早些时候，我们注意到无法更改头像。
日志显示如下错误：无法将 Hash 隐式转换为 String：
hostname web1-app, [web2-app]
process_id 815
application_version bfe7896ce82d26b70b70d8e6470330331eacd0ab
HTTP_HOST redacted
REQUEST_URI /posts
REQUEST_METHOD POST
HTTP_USER_AGENT Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.0
HTTP_ACCEPT */*
HTTP_REFERER https://redacted/
HTTP_X_FORWARDED_FOR redacted
username VladSv
error_message no implicit conversion of Hash into String
instructions convert, [png:/var/www/discourse/tmp/download_cache/dfae3db8fee87a3abc7ad00830e917bab294253e.png[0], -auto-orient, -gravity, center, -background, transparent, -thumbnail, 1024x576^, -extent, 1024x576, -interpolate, catrom, -unsharp, 2x0.5+0.7+0, -interlace, none, -profile, /var/www/discourse/vendor/data/RT_sRGB.icm, png:/tmp/discourse-thumbnail20260808-815-ftpz9a.png]
time 11:26 am
location
upload_id 538657
Message (16783 copies reported)
Failed to optimize image: unknown reason
Backtrace
/var/www/discourse/lib/discourse.rb:1115:in 'block in Discourse.warn'
/var/www/discourse/lib/discourse.rb:1109:in 'Array#each'
/var/www/discourse/lib/discourse.rb:1109:in 'Discourse.warn'
/var/www/discourse/app/models/optimized_image.rb:362:in 'OptimizedImage.convert_with'
/var/www/discourse/plugins/discourse-topic-previews-sidecar/lib/topic_previews/optimized_image_extension.rb:24:in 'TopicPreviews::OptimizedImageExtension#optimize'
/var/www/discourse/app/models/optimized_image.rb:317:in 'OptimizedImage.resize'
/var/www/discourse/app/models/optimized_image.rb:114:in 'block in OptimizedImage.create_for'
/var/www/discourse/app/models/optimized_image.rb:19:in 'block (2 levels) in OptimizedImage.lock'
/var/www/discourse/lib/distributed_mutex.rb:53:in 'block in DistributedMutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:49:in 'Thread::Mutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:49:in 'DistributedMutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:34:in 'DistributedMutex.synchronize'
/var/www/discourse/app/models/optimized_image.rb:19:in 'block in OptimizedImage.lock'
/var/www/discourse/lib/distributed_mutex.rb:53:in 'block in DistributedMutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:49:in 'Thread::Mutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:49:in 'DistributedMutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:34:in 'DistributedMutex.synchronize'
/var/www/discourse/app/models/optimized_image.rb:18:in 'OptimizedImage.lock'
/var/www/discourse/app/models/optimized_image.rb:82:in 'OptimizedImage.create_for'
/var/www/discourse/app/models/upload.rb:162:in 'Upload#get_optimized_image'
/var/www/discourse/app/controllers/user_avatars_controller.rb:238:in 'UserAvatarsController#get_optimized_image'
/var/www/discourse/app/controllers/user_avatars_controller.rb:138:in 'UserAvatarsController#show_in_site'
/var/www/discourse/app/controllers/user_avatars_controller.rb:91:in 'block (2 levels) in UserAvatarsController#show'
/var/www/discourse/lib/hijack.rb:68:in 'BasicObject#instance_eval'
/var/www/discourse/lib/hijack.rb:68:in 'block (2 levels) in Hijack#hijack'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/i18n-1.14.8/lib/i18n.rb:354:in 'I18n::Base#with_locale'
/var/www/discourse/lib/hijack.rb:68:in 'block in Hijack#hijack'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/concurrent-ruby-1.3.7/lib/concurrent-ruby/concurrent/promises.rb:911:in 'Concurrent::Promises::Event#callback_on_resolution'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/concurrent-ruby-1.3.7/lib/concurrent-ruby/concurrent/promises.rb:797:in 'Concurrent::Promises::AbstractEventFuture#call_callback'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/concurrent-ruby-1.3.7/lib/concurrent-ruby/concurrent/promises.rb:803:in 'Concurrent::Promises::AbstractEventFuture#call_callbacks'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/concurrent-ruby-1.3.7/lib/concurrent-ruby/concurrent/promises.rb:692:in 'Concurrent::Promises::AbstractEventFuture#resolve_with'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/concurrent-ruby-1.3.7/lib/concurrent-ruby/concurrent/promises.rb:1325:in 'Concurrent::Promises::ResolvableEvent#resolve'
/var/www/discourse/lib/scheduler/defer.rb:135:in 'block in Scheduler::Deferrable#do_work'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rails_multisite-7.0.0/lib/rails_multisite/connection_management/null_instance.rb:49:in 'RailsMultisite::ConnectionManagement::NullInstance#with_connection'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rails_multisite-7.0.0/lib/rails_multisite/connection_management.rb:17:in 'RailsMultisite::ConnectionManagement.with_connection'
/var/www/discourse/lib/scheduler/defer.rb:130:in 'Scheduler::Deferrable#do_work'
/var/www/discourse/lib/scheduler/defer.rb:116:in 'block (2 levels) in Scheduler::Deferrable#start_thread'