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File ./vendor/autoload.php missing or not readable. Most likely you did not run Composer to install library files.

Posted on February 5, 2018

When I install phpmyadmin this appears. File ./vendor/autoload.php missing or not readable. Most likely you did not run Composer to install library files. I tested it on ubuntu 14.04 and 16.04 and it’s still the same thing. I installed the composer but it still continues … Can anyone help me?



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It sounds like you are trying to install phpMyAdmin from source. Is that correct?

Composer is a tool for handling dependencies for PHP projects. After installing it, you can then use it to install the rest of the needed dependencies by running the following from inside the project’s directory:

  1. composer update --no-dev

For more information about installing phpMyAdmin from source, see their documentation. Though in most cases, you’ll want to use the version shipped with your distribution. For Ubuntu, see:

You can run shell cmd like that

sudo apt-get install composer -y
cd /var/www/22222/htdocs/db/pma
sudo composer install
sudo chown www-data: * -R

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