AltoRouter not executing routes, but it's working in localhost (LAMP)

Question

Problem

My AltoRouter is not routing properly on live server (LAMP), but it's working just fine in localhost (XAMPP). How do I know that the routing part is correct? Because, when I execute GET request to assigned routes, the server returns 500 error:

However, when I execute GET request to non-existent routes, the server returns 404 Not Found response:

I configured .htaccess:

.htaccess file

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /caffemania
    RewriteRule ^index\.php$ - [L]
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule . index.php [L]
</IfModule>

index.php

<?php
require_once 'vendor/autoload.php';
include_once 'api/validate_token.php';

// Setup for base path of project
$router = new AltoRouter();
$router->setBasePath('/caffemania');

// Main routes
$router->map('GET', '/', function() { require __DIR__ . '/controllers/landing.php'; }, 'landing');
$router->map('GET', '/prijava/', function() { require __DIR__ . '/controllers/landing.php'; }, 'login');
$router->map('GET', '/pocetna/', function() { require __DIR__ . '/controllers/homepage.php'; }, 'homepage');
$router->map('GET', '/lokacije/', function() { require __DIR__ . '/controllers/locations.php'; }, 'locations');
$router->map('GET', '/aparati/', function() { require __DIR__ . '/controllers/machines.php'; }, 'machines');
$router->map('GET', '/izvjestaji/', function() { require __DIR__ . '/controllers/reports.php'; }, 'reports');
$router->map('GET', '/skladiste/', function() { require __DIR__ . '/controllers/warehouse.php'; }, 'warehouse');

// Logout
$router->map('GET', '/logout/', function() { 
    unset($_COOKIE['jwt']);
    setcookie('jwt', '', time() - 3600, '/');
    $logout_flag = true;
    require __DIR__ . '/controllers/landing.php'; 
}, 'logout');

// Specific routes
$router->map('GET', '/aparati/[i:id]/', function($id) { 
    $m_id = $id;
    require __DIR__ . '/controllers/machine_details.php'; 
}, 'machine-details');

$router->map('GET', '/izvjestaji/[i:id]/', function($id) { 
    $r_id = $id;
    require __DIR__ . '/controllers/report_details.php'; 
}, 'report-details');

// Get the match
$match = $router->match();

// Call closure or throw 404 status
if ($match && is_callable($match['target'])) {
    call_user_func_array($match['target'], $match['params']); 
} else {
    // No route was matched
    header($_SERVER["SERVER_PROTOCOL"] . ' 404 Not Found');
}
?>