src/main/webapp/src/pages/MemberList.jsx

@@ -169,6 +169,10 @@ function FileOutput() {
                         certifDate: e.certif ? new Date(e.certif.split("¤")[1]) : '',
                     }
 
+                    if (isNaN(tmp.certifDate) || tmp.certifDate === 'NaN') {
+                        tmp.certifDate = ''
+                    }
+
                     //tmp.birthdate.setMilliseconds(0);
                     //tmp.birthdate.setSeconds(0);
                     //tmp.birthdate.setMinutes(0);