Laravel 5 Failed opening required bootstrap/../vendor/autoload.php

Run composer install in your root project folder (or php composer.phar install).

Run composer with --no-scripts

composer update --no-scripts

This shall fix the issue. I tried this on Mac and Linux.

Which OS you are using ? For Windows : Go to Command Prompt

set path to www/{ur project}

For me : www/laravel5

Then type this command : composer install

It will automatically install all dependency in vendor/

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