diff --git a/app/controllers/api/submitters_controller.rb b/app/controllers/api/submitters_controller.rb
index bc1a962b..4a73a96d 100644
--- a/app/controllers/api/submitters_controller.rb
+++ b/app/controllers/api/submitters_controller.rb
@@ -77,6 +77,10 @@ module Api
                                                                 with_urls: true,
                                                                 with_events: false,
                                                                 params:)
+    rescue Submitters::NormalizeValues::BaseError => e
+      Rollbar.warning(e) if defined?(Rollbar)
+
+      render json: { error: e.message }, status: :unprocessable_entity
     end
 
     def submitter_params