"500 Server Error" after uploading

Work through these in order:

1. PHP version: the app needs the PHP version listed in the documentation (8.2 or 8.3, depending on the product). Check it in your hosting panel.
2. Permissions: storage/ and bootstrap/cache/ must be writable by the web server.
3. Document root: your domain must point at the public/ folder, not the app's root folder.
4. Clear caches: run php artisan optimize:clear, or delete the files in bootstrap/cache/ except .gitignore.
5. Read the error: open storage/logs/laravel.log. The last entry names the real problem. Attach it to a ticket if it isn't clear.