Error installing package

[Josedu]

I get this error when I try install the library with the command composer require backup-manager/laravel
`
Using version ^1.4 for backup-manager/laravel
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Dependency resolution completed in 0.481 seconds
Analyzed 17059 packages to resolve dependencies
Analyzed 722956 rules to resolve dependencies
Nothing to install or update
Dependency resolution completed in 0.001 seconds
Generating optimized autoload files

post-autoload-dump: Illuminate\Foundation\ComposerScripts::postAutoloadDump
post-autoload-dump: @php artisan package:discover --ansi

Symfony\Component\Debug\Exception\FatalThrowableError : Argument 1 passed to BackupManager\Config\Config::__construct() must be of the type array, null given, called in /shared/httpd/laratransric/laratransric/vendor/backup-manager/laravel/src/Laravel55ServiceProvider.php on line 52

at /shared/httpd/laratransric/laratransric/vendor/backup-manager/backup-manager/src/Config/Config.php:28
24|
25| /**
26| * @param array $config
27| */

28| public function __construct(array $config) {
29| $this->config = $config;
30| }
31|
32| /**

Exception trace:

1 BackupManager\Config\Config::__construct()
/shared/httpd/laratransric/laratransric/vendor/backup-manager/laravel/src/Laravel55ServiceProvider.php:52

2 BackupManager\Laravel\Laravel55ServiceProvider::BackupManager\Laravel{closure}(Object(Illuminate\Foundation\Application), [])
/shared/httpd/laratransric/laratransric/vendor/laravel/framework/src/Illuminate/Container/Container.php:799

Please use the argument -v to see more details.
Script @php artisan package:discover --ansi handling the post-autoload-dump event returned with error code 1

Installation failed, reverting ./composer.json to its original content.
`
My system is:

Laravel: 6.0
PHP: 7.3