diff --git a/app/assets/javascripts/katello/sync_management/sync_management.js b/app/assets/javascripts/katello/sync_management/sync_management.js
index 44bfa017727..82fa59eb428 100644
--- a/app/assets/javascripts/katello/sync_management/sync_management.js
+++ b/app/assets/javascripts/katello/sync_management/sync_management.js
@@ -387,6 +387,20 @@ $("#sync_product_form")
     if ($("input[name='repoids[]']:checked").length === 0) {
       return false;
     }
+  })
+  .on("ajax:error", function (event, response) {
+    let errorMessage = localize("error");
+    if (response && response.responseJSON && response.responseJSON.error) {
+      errorMessage = response.responseJSON.error;
+    }
+    if (window.tfm && window.tfm.toastNotifications) {
+      window.tfm.toastNotifications.notify({
+        message: errorMessage,
+        type: "danger",
+      });
+    } else {
+      alert(errorMessage);
+    }
   });
 
 $("#sync_toggle").on("change", function () {
diff --git a/app/controllers/katello/sync_management_controller.rb b/app/controllers/katello/sync_management_controller.rb
index bba9093707f..42baf785d72 100644
--- a/app/controllers/katello/sync_management_controller.rb
+++ b/app/controllers/katello/sync_management_controller.rb
@@ -32,8 +32,12 @@ def index
     end
 
     def sync
-      tasks = sync_repos(params[:repoids]) || []
-      render :json => tasks.as_json
+      begin
+        tasks = sync_repos(params[:repoids]) || []
+        render json: tasks.as_json
+      rescue StandardError => e
+        render json: { error: e.message }, status: :internal_server_error
+      end
     end
 
     def sync_status
diff --git a/app/models/katello/repository.rb b/app/models/katello/repository.rb
index f1daefb7681..59e2b611419 100644
--- a/app/models/katello/repository.rb
+++ b/app/models/katello/repository.rb
@@ -704,7 +704,7 @@ def check_ready_to_act!
                           .uniq
                           .map { |task| "- #{Setting['foreman_url']}/foreman_tasks/tasks/#{task&.id}" }
                           .join("\n")
-        fail _("This repository has pending tasks in associated content views. Please wait for the tasks: " + errored_tasks +
+        fail _("Repository #{self.label} has pending tasks in associated content views. Please wait for the tasks: " + errored_tasks +
                " to complete before proceeding.")
       end
     end