Better management of errors

app/Main.php

@@ -96,10 +96,11 @@ class Main extends Controller {
                 $f3->set('VERB', 'GET');
                 $this->feedbackform($f3, $args);
             } catch (RequestException $e) {
-                print_r(Psr7\str($e->getRequest()));
+                $block_content = print_r(Psr7\str($e->getRequest()));
                 if ($e->hasResponse()) {
-                    print_r(Psr7\str($e->getResponse()));
+                    $block_content .= print_r(Psr7\str($e->getResponse()));
                 }
+                $f3->set('block_content', $block_cntent);
             }
         }
     }