Merge pull request #80 from utopia-php/error-handler-message

fix: error message in group error handlers

src/App.php

@@ -576,7 +576,7 @@ public function execute(Route $route, Request $request): static
                             $arguments = $this->getArguments($error, $values, $request->getParams());
                             \call_user_func_array($error->getAction(), $arguments);
                         } catch (\Throwable $e) {
-                            throw new Exception('Error handler had an error', 0, $e);
+                            throw new Exception('Error handler had an error: ' . $e->getMessage(), 500, $e);
                         }
                     }
                 }