Why aren't the package classes loaded?

Question

PHP

Hello. I've been struggling with the issue for two days, I will be glad to help.

I wrote a package for Laravel, the structure is as follows:

• composer.json
  
• config
  
• src
  
  • Exchanges
    
  • Providers
    
  • Processor.php
    
  
  

Key points in the composer.json of the package:

"autoload": {
        "classmap": [
            "src"
        ],
        "psr-4": {
            "ExchangeProcessor\\": "src/"
        }
    },
    "extra": {
        "laravel": {
            "providers": [
                "ExchangeProcessor\\Providers\\ConfigServiceProvider"
            ]
        }
    }

To pull the package, I wrote the following in composer.json of the main project:

"repositories": [
        {
            "type":"package",
            "package": {
                "name": "exchange-processor",
                "version":"master",
                "source": {
                    "url": "https://github.com/.../exchangeProcessor.git",
                    "type": "git",
                    "reference":"main"
                }
            }
        }
    ],
    "require": {
        ...
        "exchange-processor": "master",
    },

But the problem is that the provider specified in the composer.json of the package does not start.
And when I write $processor = new \ExchangeProcessor/Processor();, I get an error Error : Class "ExchangeProcessor\Processor" not found .

What could be the problem?