fix: 修复创建测试计划失败的问题

backend/src/main/java/io/metersphere/notice/service/MailService.java

@@ -22,6 +22,7 @@ import io.metersphere.track.request.testcase.IssuesRequest;
 import io.metersphere.track.request.testplan.AddTestPlanRequest;
 import io.metersphere.track.request.testreview.SaveCommentRequest;
 import io.metersphere.track.request.testreview.SaveTestCaseReviewRequest;
+import org.apache.commons.collections4.CollectionUtils;
 import org.apache.commons.collections4.MapUtils;
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.RegExUtils;
@@ -298,6 +299,9 @@ public class MailService {
         helper.setSubject("MeterSphere平台" + Translator.get("test_plan_notification"));
         String[] users;
         List<String> emails = new ArrayList<>();
+        if (CollectionUtils.isEmpty(userIds)) {
+            return;
+        }
         List<UserDetail> list = userService.queryTypeByIds(userIds);
         list.forEach(u -> {
             emails.add(u.getEmail());

backend/src/main/java/io/metersphere/xpack

@@ -1 +1 @@
-Subproject commit cf6b06526324326a563d933e07118fac014a63b4
+Subproject commit ee74568be0beba46da19616f5832e83f9164c688

frontend/src/business/components/xpack

@@ -1 +1 @@
-Subproject commit 06d935cd1d22ab36f09763745c2aff8ad3fb08c1
+Subproject commit cc38137a69a0f20fadece9c0f9f50a9468c4ace9