Filter out Releases with missing tags

Closes https://gitlab.com/gitlab-org/gitlab/issues/211394

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/27716

app/finders/releases_finder.rb

@@ -9,7 +9,8 @@ class ReleasesFinder
   def execute(preload: true)
     return Release.none unless Ability.allowed?(@current_user, :read_release, @project)
 
-    releases = @project.releases
+    # See https://gitlab.com/gitlab-org/gitlab/-/issues/211988
+    releases = @project.releases.where.not(tag: nil) # rubocop:disable CodeReuse/ActiveRecord
     releases = releases.preloaded if preload
     releases.sorted
   end

changelogs/unreleased/211394-releases-page-in-not-loading-on-pagination.yml

+---
+title: Filter out Releases with missing tags
+merge_request: 27716
+author:
+type: fixed

spec/finders/releases_finder_spec.rb

@@ -52,6 +52,18 @@ describe ReleasesFinder do
           subject
         end
       end
+
+      # See https://gitlab.com/gitlab-org/gitlab/-/merge_requests/27716
+      context 'when tag is nil' do
+        before do
+          v1_0_0.update_column(:tag, nil)
+        end
+
+        it 'ignores rows with a nil tag' do
+          expect(subject.size).to eq(1)
+          expect(subject).to eq([v1_1_0])
+        end
+      end
     end
   end
 end