Proper base url

Hello Everyone,
I'm experiencing an issue with the base URL. I've tried changing the base URL in the .env file as follows:

Code:

app.baseURL = 'http://localhost/amp'

However, I keep getting the following error:


The requested resource /amp/ was not found on this server.
When I try accessing another link, such as

Code:

/amp/frontend

I get a controller error:

Code:

Controller or its method is not found: \App\Controllers\Amp::frontend

I attempted to use a route group for amp and it works for /amp/(.*) , but not for /amp itself. 
Here’s the route configuration I used:
$routes->group('amp', function($routes) {
$routes->get('/', 'Dashboard::index');
$routes->add('authsso/(egment)', 'Dashboard::authsso/$1');
$routes->post('dashboard/grafik', 'Dashboard::grafik');
});

Does anyone have a solution for this issue?

Read docs https://codeigniter4.github.io/userguide...-subfolder
and baseURL ending slash.

Simple CI 4 project for beginners codeigniter-expenses ( topic )

Read docs https://codeigniter4.github.io/userguide...-subfolder
and baseURL ending slash.

I have tried adding a trailing slash, but I’m still getting the same error. Is hosting with a subfolder the same as using a reverse proxy? Because I was provided a reverse proxy with the domain

Code:

binamarga.pu.go.id/amp/