Upgrading Laravel 5.5 to 5.6 error

Question

I am trying to upgrade my Laravel 5.5 to 5.6. I have followed the instructions from the laravel website, yet I got this error:

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Answer 1

First install Laravel 5.6 i faced this error as well. Just follow the few steps below will fix it:

• Make sure your file composer.json requirement has:

    "require": {
        "php": "^7.1.3",
        "fideloper/proxy": "^4.0",
            },

• Then try composer update to make sure your composer is up-to-date
• Finally run: composer require fideloper/proxy:~4.0
• Done!