fix save proof error

src/pages/Proof/Create_FromApp/ProofForm.js

@@ -13,6 +13,8 @@ import {
 
 import * as UrlUtils from "utils/ApiPathConst";
 import * as HttpUtils from "utils/HttpUtils";
+import * as DateUtils from "utils/DateUtils"
+
 import MainCard from "components/MainCard";
 import * as ComboData from "utils/ComboData";
 import * as React from "react";