各位大大好，本人是剛學幾個月的程式小小小菜鳥，第一次發文，如有不周，請見諒，謝謝

小弟最近剛做了一份使用MVC簡易購物網站，有使用Composer的psr-4自動載入(Composer只有使用這個)

但是最近在上傳bluehost的cpanel虛擬主機時出現抓不到Class的問題(Uncaught Class)(在本地載入都正常)

在cpanel，我只有把檔案丟上去，再設定資料庫都參數而已

由於第一次使用虛擬和雲端主機，對這塊還不太熟

找了很多資料，但小弟對英文文章比較苦手，沒有找到

所以想說試試看heroku，有沒有機會成功

也有使用在上傳時.gitignore也有忽略vender

但也是與cpanel有同樣的問題，Uncaught Class

cpanel和heroku我都有測試如果沒有使用autoload都是可以有畫面

所以有幾個問題想問各位大大

1.cpanel原本就有支援Composer嗎?如果沒有是要使用SSH連到cpanel載嗎?

2.正常使用autoload會有這類問題嗎?如果不會那與composer.json問題比較有關係嗎?

這邊附上heroku的log,謝謝

2021-05-08T07:09:04.050374+00:00 app[web.1]: [08-May-2021 07:09:04 UTC] PHP Fatal error:  Uncaught Dotenv\Exception\InvalidPathException: Unable to read any of the environment file(s) at [/app/.env]. in /app/vendor/vlucas/phpdotenv/src/Store/FileStore.php:68
2021-05-08T07:09:04.050394+00:00 app[web.1]: Stack trace:
2021-05-08T07:09:04.050563+00:00 app[web.1]: #0 /app/vendor/vlucas/phpdotenv/src/Dotenv.php(222): Dotenv\Store\FileStore->read()
2021-05-08T07:09:04.053945+00:00 app[web.1]: #1 /app/config.php(4): Dotenv\Dotenv->load()
2021-05-08T07:09:04.053966+00:00 heroku[router]: at=info method=GET path="/" host=ecom-cart-20210508.herokuapp.com request_id=2e241588-767e-4194-b16a-04faa14e2701 fwd="111.83.91.197" dyno=web.1 connect=0ms service=50ms status=500 bytes=279 protocol=https
2021-05-08T07:09:04.054059+00:00 app[web.1]: #2 /app/Bootstrap.php(5): require('...')
2021-05-08T07:09:04.054187+00:00 app[web.1]: #3 /app/public/index.php(6): require_once('...')
2021-05-08T07:09:04.054229+00:00 app[web.1]: #4 {main}
2021-05-08T07:09:04.054426+00:00 app[web.1]:   thrown in /app/vendor/vlucas/phpdotenv/src/Store/FileStore.php on line 68
2021-05-08T07:09:04.055955+00:00 app[web.1]: 10.69.225.154 - - [08/May/2021:07:09:04 +0000] "GET / HTTP/1.1" 500 - "https://dashboard.heroku.com/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36
2021-05-08T07:14:37.000000+00:00 app[api]: Build started by user rray12tw346@gmail.com
2021-05-08T07:14:47.146623+00:00 heroku[web.1]: Restarting
2021-05-08T07:14:47.151252+00:00 heroku[web.1]: State changed from up to starting
2021-05-08T07:14:46.651601+00:00 app[api]: Release v11 created by user rray12tw346@gmail.com
2021-05-08T07:14:46.651601+00:00 app[api]: Deploy b65e7961 by user rray12tw346@gmail.com
2021-05-08T07:14:46.000000+00:00 app[api]: Build succeeded
2021-05-08T07:14:48.365959+00:00 heroku[web.1]: Stopping all processes with SIGTERM
2021-05-08T07:14:48.629076+00:00 heroku[web.1]: Process exited with status 143
2021-05-08T07:14:49.153071+00:00 heroku[web.1]: Starting process with command `vendor/bin/heroku-php-apache2 public/`
2021-05-08T07:14:48.454370+00:00 app[web.1]: SIGTERM received, attempting graceful shutdown...
2021-05-08T07:14:48.455305+00:00 app[web.1]: Stopping php-fpm...
2021-05-08T07:14:48.457881+00:00 app[web.1]: Stopping httpd gracefully...
2021-05-08T07:14:48.458222+00:00 app[web.1]: Stopping httpd...
2021-05-08T07:14:48.552978+00:00 app[web.1]: Shutdown complete.
2021-05-08T07:14:54.710972+00:00 app[web.1]: DOCUMENT_ROOT changed to 'public/'
2021-05-08T07:14:54.861284+00:00 app[web.1]: Detected 536870912 Bytes of RAM
2021-05-08T07:14:54.939084+00:00 app[web.1]: PHP memory_limit is 128M Bytes
2021-05-08T07:14:54.959685+00:00 app[web.1]: Starting php-fpm with 4 workers...
2021-05-08T07:14:55.244521+00:00 app[web.1]: Starting httpd...
2021-05-08T07:14:56.083250+00:00 heroku[web.1]: State changed from starting to up
2021-05-08T07:14:57.127566+00:00 heroku[router]: at=info method=GET path="/" host=ecom-cart-20210508.herokuapp.com request_id=b12ba00c-4494-4deb-998f-ea77df092034 fwd="111.83.91.197" dyno=web.1 connect=0ms service=29ms status=500 bytes=279 protocol=https
2021-05-08T07:14:57.129200+00:00 app[web.1]: [08-May-2021 07:14:57 UTC] PHP Fatal error:  Uncaught Error: Class "App\Controllers\PagesController" not found in /app/core/Router.php:58
2021-05-08T07:14:57.129294+00:00 app[web.1]: Stack trace:
2021-05-08T07:14:57.129484+00:00 app[web.1]: #0 /app/core/Router.php(49): Core\Router->callAction()
2021-05-08T07:14:57.129661+00:00 app[web.1]: #1 /app/app/routes.php(30): Core\Router->direct()
2021-05-08T07:14:57.129824+00:00 app[web.1]: #2 /app/public/index.php(20): require('...')
2021-05-08T07:14:57.129882+00:00 app[web.1]: #3 {main}
2021-05-08T07:14:57.129989+00:00 app[web.1]:   thrown in /app/core/Router.php on line 58
2021-05-08T07:14:57.130433+00:00 app[web.1]: 10.69.85.146 - - [08/May/2021:07:14:57 +0000] "GET / HTTP/1.1" 500 - "https://dashboard.heroku.com/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36