Fix saving Jira Configuration for Group

ee/app/models/project_services/ee/jira_service.rb

@@ -12,7 +12,7 @@ module EE
     end
 
     def jira_vulnerabilities_integration_enabled?
-      project.jira_vulnerabilities_integration_available? && vulnerabilities_enabled
+      project&.jira_vulnerabilities_integration_available? && vulnerabilities_enabled
     end
 
     def project_key_required?

ee/changelogs/unreleased/284181-fix-saving-jira-configuration-when-is-not-configured-for-projec.yml

+---
+title: Fix Group Jira Integration configuration page
+merge_request: 47944
+author:
+type: fixed

ee/spec/models/project_services/jira_service_spec.rb

@@ -40,6 +40,12 @@ RSpec.describe JiraService do
   describe 'jira_vulnerabilities_integration_enabled?' do
     subject(:jira_vulnerabilities_integration_enabled) { jira_service.jira_vulnerabilities_integration_enabled? }
 
+    context 'when integration is not configured for the project' do
+      let(:options) { { project: nil } }
+
+      it { is_expected.to be_falsey }
+    end
+
     context 'when jira integration is not available for the project' do
       before do
         allow(jira_service.project).to receive(:jira_vulnerabilities_integration_available?).and_return(false)