diff --git a/src/main/java/com/wflow/workflow/service/impl/ProcessTaskServiceImpl.java b/src/main/java/com/wflow/workflow/service/impl/ProcessTaskServiceImpl.java
index f20da2b..13c5426 100644
--- a/src/main/java/com/wflow/workflow/service/impl/ProcessTaskServiceImpl.java
+++ b/src/main/java/com/wflow/workflow/service/impl/ProcessTaskServiceImpl.java
@@ -380,14 +380,16 @@ public class ProcessTaskServiceImpl implements ProcessTaskService {
             String valueType = jo.getString("valueType");
             if (Objects.equals(valueType, "Array")) {
                 JSONArray items = jo.getJSONObject("props").getJSONArray("items");
-                for (int j = 0; j < items.size(); j++) {
-                    JSONObject jo1 = items.getJSONObject(j);
-                    String valueType1 = jo.getString("valueType");
-                    if (Objects.equals(valueType1, "Date")) {
-                        if (jo1.getString("id").equals(fieldId)) {
-                            find = true;
-                            format = jo1.getJSONObject("props").getString("format");
-                            break;
+                if (items != null) {
+                    for (int j = 0; j < items.size(); j++) {
+                        JSONObject jo1 = items.getJSONObject(j);
+                        String valueType1 = jo.getString("valueType");
+                        if (Objects.equals(valueType1, "Date")) {
+                            if (jo1.getString("id").equals(fieldId)) {
+                                find = true;
+                                format = jo1.getJSONObject("props").getString("format");
+                                break;
+                            }
                         }
                     }
                 }