diff --git a/app/controllers/errors_controller.rb b/app/controllers/errors_controller.rb
index 0c9e3632..f6401243 100644
--- a/app/controllers/errors_controller.rb
+++ b/app/controllers/errors_controller.rb
@@ -40,7 +40,7 @@ class ErrorsController < ActionController::Base
         render json: { status: error_status_code, error: }.compact, status: error_status_code
       end
 
-      f.html { render error_status_code.to_s, status: error_status_code }
+      f.any { render error_status_code.to_s, status: error_status_code }
     end
   end
 
@@ -51,7 +51,7 @@ class ErrorsController < ActionController::Base
     headers['Access-Control-Allow-Methods'] = 'POST, GET, PUT, PATCH, DELETE, OPTIONS'
     headers['Access-Control-Allow-Headers'] = '*'
     headers['Access-Control-Max-Age'] = '1728000'
-    headers['Access-Control-Allow-Credentials'] = true
+    headers['Access-Control-Allow-Credentials'] = 'true'
   end
 
   def error_status_code
diff --git a/config/initializers/silence_errors.rb b/config/initializers/silence_errors.rb
new file mode 100644
index 00000000..ab3090b5
--- /dev/null
+++ b/config/initializers/silence_errors.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module SilenceErrors
+  def log_error(request, wrapper)
+    return if wrapper.status_code == 404
+
+    super
+  end
+end
+
+ActionDispatch::DebugExceptions.prepend(SilenceErrors)