Hey guys,
I recently migrated my discourse from a subdomain to a subfolder and all other assets work properly apart from the user avatars - no matter what image I upload, I always get this avatar - 
There are no errors on the profile page, it says the update is successful
I get the following errors in my error log:
Here’s the full stack trace of the last one:
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_controller/metal/data_streaming.rb:68:in `send_file'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_controller/metal/instrumentation.rb:52:in `block in send_file'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/notifications.rb:164:in `block in instrument'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/notifications.rb:164:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_controller/metal/instrumentation.rb:50:in `send_file'
/var/www/discourse/app/controllers/uploads_controller.rb:64:in `block in show'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rails_multisite-1.0.6/lib/rails_multisite/connection_management.rb:71:in `with_connection'
/var/www/discourse/app/controllers/uploads_controller.rb:52:in `show'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_controller/metal/implicit_render.rb:4:in `send_action'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/abstract_controller/base.rb:198:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_controller/metal/rendering.rb:10:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/callbacks.rb:117:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/callbacks.rb:505:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/callbacks.rb:92:in `__run_callbacks__'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/callbacks.rb:81:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/abstract_controller/callbacks.rb:19:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_controller/metal/rescue.rb:29:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/notifications.rb:164:in `block in instrument'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/notifications.rb:164:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.9/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/abstract_controller/base.rb:137:in `process'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionview-4.2.9/lib/action_view/rendering.rb:30:in `process'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-mini-profiler-0.10.5/lib/mini_profiler/profiling_methods.rb:76:in `block in profile_method'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_controller/metal.rb:196:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_controller/metal.rb:237:in `block in action'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/routing/route_set.rb:74:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/routing/route_set.rb:43:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/journey/router.rb:43:in `block in serve'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/journey/router.rb:30:in `each'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/journey/router.rb:30:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/routing/route_set.rb:817:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-protection-1.5.3/lib/rack/protection/frame_options.rb:31:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/strategy.rb:189:in `call!'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/strategy.rb:167:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/strategy.rb:189:in `call!'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/strategy.rb:167:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/strategy.rb:189:in `call!'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/strategy.rb:167:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/strategy.rb:189:in `call!'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/strategy.rb:167:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/strategy.rb:189:in `call!'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/strategy.rb:167:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/strategy.rb:189:in `call!'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/strategy.rb:167:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.6.1/lib/omniauth/builder.rb:63:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.8/lib/rack/conditionalget.rb:25:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.8/lib/rack/head.rb:13:in `call'
/var/www/discourse/lib/middleware/anonymous_cache.rb:149:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/middleware/params_parser.rb:27:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/middleware/flash.rb:260:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.8/lib/rack/session/abstract/id.rb:225:in `context'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.8/lib/rack/session/abstract/id.rb:220:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/middleware/cookies.rb:560:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.9/lib/active_record/query_cache.rb:36:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/callbacks.rb:88:in `__run_callbacks__'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/callbacks.rb:778:in `_run_call_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.9/lib/active_support/callbacks.rb:81:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/middleware/callbacks.rb:27:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/logster-1.2.7/lib/logster/middleware/reporter.rb:31:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/rack/logger.rb:38:in `call_app'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/rack/logger.rb:22:in `call'
/var/www/discourse/config/initializers/100-quiet_logger.rb:17:in `call_with_quiet_assets'
/var/www/discourse/config/initializers/100-silence_logger.rb:29:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.9/lib/action_dispatch/middleware/request_id.rb:21:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.8/lib/rack/methodoverride.rb:22:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.8/lib/rack/runtime.rb:18:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.8/lib/rack/sendfile.rb:113:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-mini-profiler-0.10.5/lib/mini_profiler/profiler.rb:171:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/message_bus-2.0.5/lib/message_bus/rack/middleware.rb:63:in `call'
/var/www/discourse/lib/middleware/request_tracker.rb:73:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/engine.rb:518:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/application.rb:165:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/railtie.rb:194:in `public_send'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/railties-4.2.9/lib/rails/railtie.rb:194:in `method_missing'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.8/lib/rack/urlmap.rb:66:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.8/lib/rack/urlmap.rb:50:in `each'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.8/lib/rack/urlmap.rb:50:in `call'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/unicorn-5.3.0/lib/unicorn/http_server.rb:606:in `process_client'
/var/www/discourse/lib/scheduler/defer.rb:85:in `process_client'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/unicorn-5.3.0/lib/unicorn/http_server.rb:702:in `worker_loop'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/unicorn-5.3.0/lib/unicorn/http_server.rb:549:in `spawn_missing_workers'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/unicorn-5.3.0/lib/unicorn/http_server.rb:142:in `start'
/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/unicorn-5.3.0/bin/unicorn:126:in `<top (required)>'
/var/www/discourse/vendor/bundle/ruby/2.3.0/bin/unicorn:22:in `load'
/var/www/discourse/vendor/bundle/ruby/2.3.0/bin/unicorn:22:in `<main>'
I just hope this isn’t the suffering @codinghorror referred to in my previous thread. 
Using the latest Discourse, no third party plugins, I have plenty of RAM available.
One more thing: Uploading images does appear to work (the file is on the system) but I get a 500 error code when I try to open it. Where can I check the specific error logs so I can put them here if needed?
