Broken phpmyadmin

I have a fresh install of easyengine and I installed phpmyadmin. When I try to access phpmyadmin via /db/pma/ I get a page saying: File ./vendor/autoload.php missing or not readable. Most likely you did not run Composer to install library files.

How to fix this?

Here the solution : https://kb.virtubox.net/knowledgebase/fix-phpmyadmin-errors-composer/