diff --git a/app/controllers/activities_controller.rb b/app/controllers/activities_controller.rb
index 7ebea3b434..cfd88b491a 100644
--- a/app/controllers/activities_controller.rb
+++ b/app/controllers/activities_controller.rb
@@ -116,12 +116,13 @@ def description
   def info
     @title = @activity.name
     @repository = @activity.repository
-    @config = @activity.merged_config
-    @config_locations = @activity.merged_config_locations
+    @config = @activity.ok? ? @activity.merged_config : {}
+    @config_locations = @activity.ok? ? @activity.merged_config_locations : {}
     @crumbs << [@activity.name, helpers.activity_scoped_path(activity: @activity, series: @series, course: @course)] << [I18n.t('crumbs.info'), '#']
     @courses_series = policy_scope(@activity.series).group_by(&:course).sort do |a, b|
       [b.first.year, a.first.name] <=> [a.first.year, b.first.name]
     end
+    flash[:alert] = I18n.t('activities.info.activity_invalid') if @activity.not_valid?
   end
 
   def edit
diff --git a/config/locales/views/activities/en.yml b/config/locales/views/activities/en.yml
index 0ea6f62070..589e93b85c 100644
--- a/config/locales/views/activities/en.yml
+++ b/config/locales/views/activities/en.yml
@@ -116,3 +116,4 @@ en:
       description_files: "We found files for these languages in the descriptions folder %{path}"
       config_info: 'Take a look at the %{doc_site} for more information about configuring exercises.'
       doc_site: 'documentation site'
+      activity_invalid: This exercise's configuration is invalid.
diff --git a/config/locales/views/activities/nl.yml b/config/locales/views/activities/nl.yml
index 28086671ca..ecb9bd1126 100644
--- a/config/locales/views/activities/nl.yml
+++ b/config/locales/views/activities/nl.yml
@@ -117,3 +117,4 @@ nl:
       description_files:   "We hebben bestanden gevonden met een beschrijving voor deze talen in de beschrijvingsmap %{path}"
       config_info: 'Neem een kijkje op de %{doc_site} voor meer informatie over het configureren van oefeningen.'
       doc_site: 'documentatiesite'
+      activity_invalid: Deze oefening heeft geen geldige configuratie.
diff --git a/test/controllers/activities_controller_test.rb b/test/controllers/activities_controller_test.rb
index 13ecc74872..6fb8302242 100644
--- a/test/controllers/activities_controller_test.rb
+++ b/test/controllers/activities_controller_test.rb
@@ -91,6 +91,14 @@ def setup
     assert_response :success
   end
 
+  test 'should show activity info when config is invalid' do
+    stub_all_activities!
+    Exercise.any_instance.stubs(:merged_config).raises(StandardError.new('ALL CAPS'))
+    @instance.update(status: :not_valid)
+    get info_activity_url(@instance)
+    assert_response :success
+  end
+
   test 'should rescue from exercise not found' do
     not_id = Random.rand(10_000)
     begin