laravel-dump-server | Bring Symfony 's Var-Dump Server to Laravel | Web Framework library

Composer is telling you what is wrong. It wants PHP8 and you offer php7.4, so it doesnt install.

From the comments it also says that laravel 9 is in development. As you're stuggling with this, I dont recommend using that version and go one back, using 8.

What I recommend doing (and what I've been doing lately to a much larger website), is first to run composer update. That way, you update all packages in a sem-ver method (so only minor updates). Deploy that to your server.

Than you can use compser outdated to see what you can update. Do composer update package/name -W (with all dependencies), just one at a time. if you run into a problem, just goto the next one, sometimes after you come back you can still do it.

If you go to packagist.org you can serach your package and see what the current versions are. Sometimes you can go up a few mayors, sometimes one, sometimes only minor. It's a bit of a puzzle.

Go to the Packagist page for spatie/laravel-newsletter and find a version of the package that supports Laravel 5.8.

Looks like 4.8.2 will do:

Run composer require "spatie/laravel-newsletter:~4.8.2".

You Need to compatible version of 'illuminate/contracts' and Apparently this package is exist in your project. check 'composer.json' file and fix 'illuminate/contracts' fits 'laravel/sanctum' and laravel version.

as @bk2204 helped me to realize my faulty assumption that checkout@v2 sets composer to v2 I was able to resolve my problem by changing the laravel.yml deployment instructions as follows:

In docker-compose.yml

You have to update the version of your guzzlehttp/guzzle becasue it is required by php version

Try to Change "guzzlehttp/guzzle": "^5.x" to this "guzzlehttp/guzzle": "^7.2.0" and then run composer update and your current php version is ^7.2

you can find more about it in here https://packagist.org/packages/guzzlehttp/guzzle#6.5.5

First of all: check if file app/Http/Kernel.php is exists and it has correct namespace and class name (without any cyrilic or etc. characters):

Actually, the issue comes from the fact that the configuration was cached without the debug-server config.

Basically, the file bootstrap/cache/config.php doesn't contain the debug-server key. If you delete this file, you will most likely clear the error as well.

Solution:

Delete the file yourProject/bootstrap/cache/config.php

You will have to wait for the next tagged release of Laravel 8.x. Currently we are on 8.9.0 which does not include this change yet.

This is an error on the part of the people managing the framework for adding this to the 8.x docs before it is actually in a release for 8.x.

After it is tagged and released you will have to update your dependency on the framework, laravel/framework, to use that method.