[Sage 10] phpdotenv error

[strarsis]

• I've read the guidelines for Contributing to Roots Projects
• This request isn't a duplicate of an existing issue
• I've read the docs and followed them (if applicable)
• This is not a personal support request that should be posted on the Roots Discourse community

Description

With recent Sage 10 there is a fatal PHP error:

Fatal error: Uncaught Error: Call to undefined method Dotenv\Repository\RepositoryBuilder::createWithDefaultAdapters() in /srv/www/web/app/themes/test-theme/vendor/illuminate/support/Env.php on line 55

Steps to reproduce

1. Create a Sage 10 project:

$ composer create-project roots/sage test-theme dev-master

2. Install composer dependencies: composer install
3. Activate the theme. Notice the fatal PHP error.

Expected behavior:
No PHP error.

Actual behavior:
PHP error:

Fatal error: Uncaught Error: Call to undefined method Dotenv\Repository\RepositoryBuilder::createWithDefaultAdapters() in /srv/www/web/app/themes/test-theme/vendor/illuminate/support/Env.php on line 55

Reproduces how often:
Always.

Versions

### 10.0.0-beta.1: TBA

Additional information

It could have something to do with acorn 2.x now being used as the Sage 10 dependency.
Or an incompatibility with a slightly older Bedrock site?

[Log1x]

Or an incompatibility with a slightly older Bedrock site?

this

[strarsis]

Yes, after updating Bedrock the error went away. This means that theme and bedrock used different versions of a library - and composer only allows one (well, at least it isn't as big and nested as a node_modules/ folder...).

[strarsis]

@jijames: Were you able to fix this issue?

[minemindmedia]

I am having the same problem attempting to get Sage 10 working on an older multisite network. Instead, I receive the following errors when the theme is active:

Fatal error: Uncaught Error: Call to undefined method Dotenv\Repository\RepositoryBuilder::createWithDefaultAdapters() in /srv/www/new-site.com/current/web/app/themes/new-site/vendor/illuminate/support/Env.php:55 Stack trace: 

#0 /srv/www/new-site.com/current/web/app/themes/new-site/vendor/illuminate/support/Env.php(76): Illuminate\Support\Env::getRepository() 

#1 /srv/www/new-site.com/current/web/app/themes/new-site/vendor/roots/acorn/src/Illuminate/Foundation/Application.php(1067): Illuminate\Support\Env::get('APP_CONFIG_CACH...')

#2 /srv/www/new-site.com/current/web/app/themes/new-site/vendor/roots/acorn/src/Illuminate/Foundation/Application.php(1015): Illuminate\Foundation\Application->normalizeCachePath('APP_CONFIG_CACH...', 'cache/config.ph...') 

#3 /srv/www/new-site.com/current/web/app/themes/new-site/vendor/roots/acorn/src/Roots/Acorn/Bootstrap/LoadConfiguration.php(24): Illuminate\Foundation\Application->getCachedConfigPath() 

#4 /srv/www/new-site.com/current/web/app/themes/new-site/vendor/roots/acorn/src in /srv/www/new-site.com/current/web/app/themes/new-site/vendor/illuminate/support/Env.php on line 55