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

To anyone who tried upgrading directly from laravel 5.5 to 5.7, and got this problem too, remove the trustedproxy.php file from app->config->trustedproxy.php. Hopes that helps someone.