Laravel-Excel: [BUG] 'File not found at path' when importing file on server while file_exists($path) returns true

Prerequisites

• Able to reproduce the behaviour outside of your code, the problem is isolated to Laravel Excel.
• Checked that your issue isn’t already filed.
• Checked if no PR was submitted that fixes this problem.

Versions

• PHP version: 7.1.16
• Laravel version: 5.7
• Package version: 3.1.1

Description

When I try following the documentation on importing a file stored on the server, I get an Illuminate\Contracts\Filesystem\FileNotFoundException saying File not found at path: [path to file]. However, a file_exists($path); returns true.

Steps to Reproduce

1. Install a fresh version of Laravel.
2. Install Laravel Excel.
3. Put your xlsx-file in the project folder, for example in the storage/app folder.
4. Run php artisan make:import UsersImport --model=User.
5. Add the following code to a route, command or somewhere you can run it:

use Maatwebsite\Excel\Facades\Excel;
use App\Imports\UsersImport;

Excel::import(new UsersImport, storage_path('app/test.xlsx'));

1. Run the code.

Expected behavior: According to the docs, the rows in the file should be imported to the users table.

Actual behavior: Illuminate\Contracts\Filesystem\FileNotFoundException: File not found at path: [path]