diff --git a/CHANGELOG.md b/CHANGELOG.md
index c6ff32f..a572e32 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Failed jobs view now renders error class and message correctly (seed data format and missing CSS class)
+
 ## [0.2.0] - 2026-05-18
 
 ### Added
diff --git a/app/views/solid_queue_web/failed_jobs/index.html.erb b/app/views/solid_queue_web/failed_jobs/index.html.erb
index 8807dad..c243fae 100644
--- a/app/views/solid_queue_web/failed_jobs/index.html.erb
+++ b/app/views/solid_queue_web/failed_jobs/index.html.erb
@@ -25,7 +25,7 @@
                   <strong><%= execution.exception_class %></strong>: <%= execution.message %>
                 </div>
               <% else %>
-                <span class="sqd-muted">—</span>
+                <span style="color:var(--muted)">—</span>
               <% end %>
             </td>
             <td class="sqd-mono"><%= execution.created_at.strftime("%Y-%m-%d %H:%M:%S") %></td>
diff --git a/spec/dummy/db/seeds.rb b/spec/dummy/db/seeds.rb
index 479100f..b8204bc 100644
--- a/spec/dummy/db/seeds.rb
+++ b/spec/dummy/db/seeds.rb
@@ -101,7 +101,7 @@
   job.ready_execution&.destroy
   SolidQueue::FailedExecution.create!(
     job: job,
-    error: { class: err[:class], message: err[:message], backtrace: [ "app/jobs/#{job.class_name.underscore}.rb:42" ] }.to_json,
+    error: { exception_class: err[:class], message: err[:message], backtrace: [ "app/jobs/#{job.class_name.underscore}.rb:42" ] },
     created_at: job.created_at
   )
 end