Fatal error: Class 'Dotenv\Dotenv' not found in ACFProInstaller/Plugin.php

[davidohlin]

When running composer update or composer install for the first time Composer fails to install ACF with the following error:

PHP Fatal error:  Uncaught Error: Class 'Dotenv\Dotenv' not found in ../ACFProInstaller/Plugin.php:246
Stack trace:
...

Fatal error: Uncaught Error: Class 'Dotenv\Dotenv' not found in ../vendor/philippbaschke/acf-pro-installer/src/ACFProInstaller/Plugin.php:246
Stack trace:
...

Roots claims this error is fixed in Composer 1.6.2, but that doesn't seem to be true.

Solution

iff-studio/acf-pro-installer#1

Sources

• Fatal error: Class 'Dotenv\Dotenv' not found in ACFProInstaller/Plugin.php #17 PhilippBaschke/acf-pro-installer#21
• https://discourse.roots.io/t/php-fatal-error-uncaught-error-class-dotenv-dotenv-not-found/11241/10
• https://stackoverflow.com/questions/37199237/fatal-error-class-dotenv-dotenv-not-found-in