php-server | tcp server extension of PHP7 | TCP library

I updated laravel to version 8.

I have a problem when I run this method (with the migrate command):

I recently performed a rather large update to this web app, and for the most part it went off without a hitch... Until the app tries to send an SMS notification from staging/production.

The upgrade from laravel 7.x to 8.x was quite simple and straightforward. At the same time we also installed Laravel Horizon. Everything went according to plan, and all works fine locally.

When we deploy to staging/production however, queued SMS notifications fail with the following exception:

ReflectionException: Class Http\Adapter\Guzzle6\Client does not exist in /home/forge/dev.example.com/releases/20210609194554/vendor/laravel/framework/src/Illuminate/Container/Container.php:836

Looking in the stack trace we can see that Nexmo is the culprit:

#5 /home/forge/dev.example.com/releases/20210609194554/vendor/nexmo/laravel/src/NexmoServiceProvider.php(150): Illuminate\Foundation\Application->make()

However in our composer.json file we are requiring Guzzle 7 with the following:

"guzzlehttp/guzzle": "^7.3",

It is worth mentioning again at this point, I have no issues sending SMS locally, the main difference between local and staging environments is that locally I use Laravel Valet and Staging uses Laravel Envoyer.

What I've tried so far:

• Changing "guzzlehttp/guzzle": "^7.3" to "guzzlehttp/guzzle": "^6.5|^7.3"
• Running php artisan horizon:purge and php artisan horizon:terminate both manually and in a deployment hook.
• Restarting the laravel horizon daemon on forge.
• trying php artisan queue:restart
• running composer dump-autoload and composer dump-autoload -o
• deleting composer.lock and the vendor/ directory from current/ then running composer install
• Restarting PHP, Nginx, and eventually the entire server :(

and more...

Any help is greatly appreciated

UPDATE Below:

Complete composer.json:

i'm following a tutorial from pusher to display notification on the website. Everything has been in line with the tutorial, however this particular error showed up when i try to access the notification on localhost:8000/test i have no clue on how to fix it.

the error message

expected result : notification send message

output : array_merge() error

related tutorial : https://pusher.com/tutorials/web-notifications-laravel-pusher-channels

related file : C:\xampp\htdocs\inventory-prototype\vendor\pusher\pusher-php-server\src\Pusher.php:518

here's my Events/ItemAdd :

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My code testing this is:

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I created this event, see code below:

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