Fix

public/js/lib/helpers.js

@@ -84,6 +84,8 @@ dbo.helpers = {
     },
 
     numberWithPoints :function(myNumber) {
+        if( ! myNumber) return 0;
+
         return myNumber.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ".");
     }
 }

public/js/lib/modals/projectModal.js

@@ -205,6 +205,7 @@ $( function () {
                 description: '',
                 date       : null,
                 costs      : 0,
+                payed      : 0,
                 inEdit     : true
             };