I only noticed a few days ago when users started complaining. But it could be when I updated everything a few weeks ago to latest version.
You mean this?
activemodel-6.0.1/lib/active_model/attribute_methods.rb:431:in `method_missing'
active_model_serializers-0.8.4/lib/active_model/serializer.rb:99:in `block in attribute'
(eval):12:in `_fast_attributes'
active_model_serializers-0.8.4/lib/active_model/serializer.rb:468:in `rescue in attributes'
active_model_serializers-0.8.4/lib/active_model/serializer.rb:455:in `attributes'
active_model_serializers-0.8.4/lib/active_model/serializer.rb:480:in `_serializable_hash'
active_model_serializers-0.8.4/lib/active_model/serializer.rb:359:in `serializable_hash'
active_model_serializers-0.8.4/lib/active_model/serializer/associations.rb:124:in `block in serialize'
activerecord-6.0.1/lib/active_record/relation/delegation.rb:85:in `each'
activerecord-6.0.1/lib/active_record/relation/delegation.rb:85:in `each'
active_model_serializers-0.8.4/lib/active_model/serializer/associations.rb:123:in `map'
active_model_serializers-0.8.4/lib/active_model/serializer/associations.rb:123:in `serialize'
/var/www/discourse/lib/freedom_patches/ams_include_without_root.rb:57:in `include!'
active_model_serializers-0.8.4/lib/active_model/serializer.rb:368:in `block in include_associations!'
active_model_serializers-0.8.4/lib/active_model/serializer.rb:367:in `each_key'
active_model_serializers-0.8.4/lib/active_model/serializer.rb:367:in `include_associations!'
active_model_serializers-0.8.4/lib/active_model/serializer.rb:362:in `serializable_hash'
active_model_serializers-0.8.4/lib/active_model/serializer.rb:343:in `as_json'
activesupport-6.0.1/lib/active_support/json/encoding.rb:22:in `encode'
activesupport-6.0.1/lib/active_support/json/encoding.rb:22:in `encode'
activesupport-6.0.1/lib/active_support/core_ext/object/json.rb:42:in `to_json'
active_model_serializers-0.8.4/lib/active_model/serializer.rb:331:in `to_json'
multi_json-1.14.1/lib/multi_json/adapters/oj.rb:56:in `dump'
multi_json-1.14.1/lib/multi_json/adapters/oj.rb:56:in `dump'
multi_json-1.14.1/lib/multi_json/adapter.rb:25:in `dump'
multi_json-1.14.1/lib/multi_json.rb:139:in `dump'
/var/www/discourse/app/controllers/application_controller.rb:453:in `render_json_dump'
/var/www/discourse/app/controllers/users_controller.rb:93:in `block (2 levels) in show'
actionpack-6.0.1/lib/action_controller/metal/mime_responds.rb:214:in `respond_to'
/var/www/discourse/app/controllers/users_controller.rb:85:in `show'
actionpack-6.0.1/lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack-6.0.1/lib/abstract_controller/base.rb:196:in `process_action'
actionpack-6.0.1/lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack-6.0.1/lib/abstract_controller/callbacks.rb:42:in `block in process_action'
activesupport-6.0.1/lib/active_support/callbacks.rb:135:in `run_callbacks'
actionpack-6.0.1/lib/abstract_controller/callbacks.rb:41:in `process_action'
actionpack-6.0.1/lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack-6.0.1/lib/action_controller/metal/instrumentation.rb:33:in `block in process_action'
activesupport-6.0.1/lib/active_support/notifications.rb:180:in `block in instrument'
activesupport-6.0.1/lib/active_support/notifications/instrumenter.rb:24:in `instrument'
activesupport-6.0.1/lib/active_support/notifications.rb:180:in `instrument'
actionpack-6.0.1/lib/action_controller/metal/instrumentation.rb:32:in `process_action'
actionpack-6.0.1/lib/action_controller/metal/params_wrapper.rb:245:in `process_action'
activerecord-6.0.1/lib/active_record/railties/controller_runtime.rb:27:in `process_action'
actionpack-6.0.1/lib/abstract_controller/base.rb:136:in `process'
actionview-6.0.1/lib/action_view/rendering.rb:39:in `process'
rack-mini-profiler-1.1.6/lib/mini_profiler/profiling_methods.rb:78:in `block in profile_method'
actionpack-6.0.1/lib/action_controller/metal.rb:191:in `dispatch'
actionpack-6.0.1/lib/action_controller/metal.rb:252:in `dispatch'
actionpack-6.0.1/lib/action_dispatch/routing/route_set.rb:51:in `dispatch'
actionpack-6.0.1/lib/action_dispatch/routing/route_set.rb:33:in `serve'
actionpack-6.0.1/lib/action_dispatch/journey/router.rb:49:in `block in serve'
actionpack-6.0.1/lib/action_dispatch/journey/router.rb:32:in `each'
actionpack-6.0.1/lib/action_dispatch/journey/router.rb:32:in `serve'
actionpack-6.0.1/lib/action_dispatch/routing/route_set.rb:837:in `call'
/var/www/discourse/lib/middleware/omniauth_bypass_middleware.rb:68:in `call'
rack-2.0.8/lib/rack/tempfile_reaper.rb:15:in `call'
rack-2.0.8/lib/rack/conditional_get.rb:25:in `call'
rack-2.0.8/lib/rack/head.rb:12:in `call'
/var/www/discourse/lib/content_security_policy/middleware.rb:12:in `call'
/var/www/discourse/lib/middleware/anonymous_cache.rb:318:in `call'
rack-2.0.8/lib/rack/session/abstract/id.rb:259:in `context'
rack-2.0.8/lib/rack/session/abstract/id.rb:253:in `call'
actionpack-6.0.1/lib/action_dispatch/middleware/cookies.rb:648:in `call'
actionpack-6.0.1/lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
activesupport-6.0.1/lib/active_support/callbacks.rb:101:in `run_callbacks'
actionpack-6.0.1/lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack-6.0.1/lib/action_dispatch/middleware/actionable_exceptions.rb:17:in `call'
actionpack-6.0.1/lib/action_dispatch/middleware/debug_exceptions.rb:32:in `call'
actionpack-6.0.1/lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
logster-2.6.3/lib/logster/middleware/reporter.rb:43:in `call'
railties-6.0.1/lib/rails/rack/logger.rb:38:in `call_app'
railties-6.0.1/lib/rails/rack/logger.rb:28:in `call'
/var/www/discourse/config/initializers/100-quiet_logger.rb:18:in `call'
/var/www/discourse/config/initializers/100-silence_logger.rb:31:in `call'
actionpack-6.0.1/lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack-6.0.1/lib/action_dispatch/middleware/request_id.rb:27:in `call'
/var/www/discourse/lib/middleware/enforce_hostname.rb:17:in `call'
rack-2.0.8/lib/rack/method_override.rb:22:in `call'
actionpack-6.0.1/lib/action_dispatch/middleware/executor.rb:14:in `call'
rack-2.0.8/lib/rack/sendfile.rb:111:in `call'
actionpack-6.0.1/lib/action_dispatch/middleware/host_authorization.rb:77:in `call'
rack-mini-profiler-1.1.6/lib/mini_profiler/profiler.rb:184:in `call'
message_bus-2.2.3/lib/message_bus/rack/middleware.rb:57:in `call'
/var/www/discourse/lib/middleware/request_tracker.rb:181:in `call'
railties-6.0.1/lib/rails/engine.rb:526:in `call'
railties-6.0.1/lib/rails/railtie.rb:190:in `public_send'
railties-6.0.1/lib/rails/railtie.rb:190:in `method_missing'
rack-2.0.8/lib/rack/urlmap.rb:68:in `block in call'
rack-2.0.8/lib/rack/urlmap.rb:53:in `each'
rack-2.0.8/lib/rack/urlmap.rb:53:in `call'
unicorn-5.5.3/lib/unicorn/http_server.rb:605:in `process_client'
unicorn-5.5.3/lib/unicorn/http_server.rb:700:in `worker_loop'
unicorn-5.5.3/lib/unicorn/http_server.rb:548:in `spawn_missing_workers'
unicorn-5.5.3/lib/unicorn/http_server.rb:144:in `start'
unicorn-5.5.3/bin/unicorn:128:in `<top (required)>'
/var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn:23:in `load'
/var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn:23:in `<main>'