The payload is invalid. Problem with decastro4 package Gmail API

Having a problem to integrate decastro4 Laravel Gmail API, after creating the JSON encrypt file.

This is what I did.

Routes:

Route::get('/oauth/gmail', function (){
    return LaravelGmail::redirect();
});

Route::get('/oauth/gmail/callback', function (){
    LaravelGmail::makeToken();
    return redirect()->to('/');
});

Route::get('/oauth/gmail/logout', function (){
    LaravelGmail::logout(); //It returns exception if fails
    return redirect()->to('/');
});

this is the file:

-> storage -------------->app -------------------->gmail ----------------------------->tokens ---------------------------------------->gmail-json.json

This is the Gmail config file:

<?php

return [

	/*
	|--------------------------------------------------------------------------
	| Gmail Configuration
	|--------------------------------------------------------------------------
	|
	|
	|
	|  Scopes Available:
	|
	|   * all - Read, send, delete, and manage your email
	|   * compose - Manage drafts and send emails
	|   * insert - Insert mail into your mailbox
	|   * labels - Manage mailbox labels
	|   * metadata - View your email message metadata such as labels and headers, but not the email body
	|   * modify - View and modify but not delete your email
	|   * readonly - View your email messages and settings
	|   * send - Send email on your behalf
	|   * settings_basic - Manage your basic mail settings
	|   * settings_sharing - Manage your sensitive mail settings, including who can manage your mail
	|
	|   Leaving the scopes empty fill use readonly
	|
	|  Credentials File Name
	|
	*/

	'project_id' => env('GOOGLE_PROJECT_ID'),
	'client_id' => env('GOOGLE_CLIENT_ID''),
	'client_secret' => env('GOOGLE_CLIENT_SECRET'),
	'redirect_url' => env('GOOGLE_REDIRECT_URI', 'http://localhost:8000/test'),

	'state' => null,

	'scopes' => [
		'readonly',
		'modify',
	],

	/*
	|--------------------------------------------------------------------------
	| Additional Scopes [URL Style]
	|--------------------------------------------------------------------------
	|
	|   'additional_scopes' => [
	|        'https://www.googleapis.com/auth/drive',
	|        'https://www.googleapis.com/auth/documents'
	|   ],
	|
	|
	*/

	'additional_scopes' => [

	],

	'access_type' => 'offline',

	'approval_prompt' => 'force',

	/*
	|--------------------------------------------------------------------------
	| Credentials File Name
	|--------------------------------------------------------------------------
	|
	|   :email to use, clients email on the file
	|
	|
	*/

	'credentials_file_name' => env('GOOGLE_CREDENTIALS_NAME', 'gmail-json'),

	/*
	|--------------------------------------------------------------------------
	| Allow Multiple Credentials
	|--------------------------------------------------------------------------
	|
	|   Allow the application to store multiple credential json files.
	|
	|
	*/

	'allow_multiple_credentials' => env('GOOGLE_ALLOW_MULTIPLE_CREDENTIALS', true),

	/*
	|--------------------------------------------------------------------------
	| Allow Encryption for json Files
	|--------------------------------------------------------------------------
	|
	|   Use Laravel Encrypt in json Files
	|
	|
	*/

	'allow_json_encrypt' => env('GOOGLE_ALLOW_JSON_ENCRYPT', true),
];

When i put GOOGLE_ALLOW_JSON_ENCRYPT = true

I'm getting this error message => Illuminate\Contracts\Encryption\DecryptException The payload is invalid. (View: C:\Users\Reda\Desktop\Newsletter\resources\views\welcome.blade.php)

When i put GOOGLE_ALLOW_JSON_ENCRYPT = false

The app working fine and also Google OAuth, but nothing happened i can't get the user access

this my code

Controller:

$messages = LaravelGmail::message()->subject('test')->all();
return view('test', compact('messages'));

Blade:

starting test

@foreach($messages as $message)
    <p>{{$message->getHtmlBody()}}</p>
    <p>{{$message->getSubject()}}</p>
@endforeach

but 'im getting this error => No credentials found.