opencart php program stopped after dispatch() - php

Question

My opencart front-end works well, while back-end /admin returns me blank page.
I debugged my /admin/index.php and find after
$controller->dispatch($action, new Action('error/not_found'));
the program stopped. So I won't be able to see even the echo.
Here is the code:
Back-end admin/index.php
// Router
if (isset($request->get['route'])) {
$action = new Action($request->get['route']);
} else {
$action = new Action('common/home');
}
// Dispatch
var_dump($action);
$controller->dispatch($action, new Action('error/not_found'));
echo "second+++++++++++++++++++++++++++++++++";
var_dump($response);
// Output
$response->output();
By the way the frond end works well, as it returned me echo and $response value after dispatch:
if (isset($request->get['route'])) {
$action = new Action($request->get['route']);
} else {
$action = new Action($config->get('config_default_controller'));
}
// Dispatch
var_dump($action);
$controller->dispatch($action, new Action($config->get('config_default_controller_error')));
echo "second++++++++++++++++++++++++++";
var_dump($response);
I have checked the $action and $controller they are all with good values and paths.
Do anyone know what happened here with dispatch ? or give me any information about dispatch and why the program stop. Thank you in advance.

Answer 1

after few hours i found solution.
In my case it was wrong config. I had same issue and after checking what is wrong i figure out that my paths in config.php file in admin folder was with wrong values.
Opencart have two cfg files.
Next thing what i changed was config_url in database. Hope it will help you.