1

app/public/js/stage_pay.js

@@ -400,7 +400,7 @@ $(document).ready(() => {
 
             const num = text ? _.toNumber(text) : null;
             let expr = text ? (num ? null : text) : null;
-            expr = expr.replace('=', '').toLowerCase();
+            expr = expr ? expr.replace('=', '').toLowerCase(): null;
             const [valid, msg] = this._checkExprValid(expr, ['bqwc', 'ybbqwc']);
             if (!valid) return [valid, msg];