Fix the loading on sending data

src/Sender.js

@@ -63,7 +63,7 @@ class Sender extends React.Component {
   }
 
   render() {
-    if (this.state.isLodaing) {
+    if (this.state.isLoading) {
       return (
         <Row className="justify-content-center">
           <Spinner animation="border" />