first upload all files

app/Install/Requirement.php

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+<?php
+
+namespace FleetCart\Install;
+
+class Requirement
+{
+    public function extensions()
+    {
+        return [
+            'PHP >= 8.0.2' => version_compare(phpversion(), '8.0.2'),
+            'Intl PHP Extension' => extension_loaded('intl'),
+            'OpenSSL PHP Extension' => extension_loaded('openssl'),
+            'PDO PHP Extension' => extension_loaded('pdo'),
+            'Mbstring PHP Extension' => extension_loaded('mbstring'),
+            'Tokenizer PHP Extension' => extension_loaded('tokenizer'),
+            'XML PHP Extension' => extension_loaded('xml'),
+            'Ctype PHP Extension' => extension_loaded('ctype'),
+            'JSON PHP Extension' => extension_loaded('json'),
+        ];
+    }
+
+    public function directories()
+    {
+        return [
+            '.env' => is_writable(base_path('.env')),
+            'storage' => is_writable(storage_path()),
+            'bootstrap/cache' => is_writable(app()->bootstrapPath('cache')),
+        ];
+    }
+
+    public function satisfied()
+    {
+        return collect($this->extensions())
+            ->merge($this->directories())
+            ->every(function ($item) {
+                return $item;
+            });
+    }
+}