composer update failed

[yjdwbj]

www-data@dc9d64815128:/www/web/fecshop$ composer update Cannot create cache directory /var/www/.composer/cache/repo/https---packagist.org/, or directory is not writable. Proceeding without cache Cannot create cache directory /var/www/.composer/cache/files/, or directory is not writable. Proceeding without cache Loading composer repositories with package information Updating dependencies (including require-dev) Your requirements could not be resolved to an installable set of packages.

Problem 1

• yiisoft/yii2-bootstrap 2.0.8 requires bower-asset/bootstrap 3.3. | 3.2. | 3.1.* -> no matching package found.
• yiisoft/yii2-bootstrap 2.0.7 requires bower-asset/bootstrap 3.3. | 3.2. | 3.1.* -> no matching package found.
• yiisoft/yii2-bootstrap 2.0.6 requires bower-asset/bootstrap 3.3. | 3.2. | 3.1.* -> no matching package found.
• yiisoft/yii2-bootstrap 2.0.5 requires bower-asset/bootstrap 3.3. | 3.2. | 3.1.* -> no matching package found.
• yiisoft/yii2-bootstrap 2.0.4 requires bower-asset/bootstrap 3.3. | 3.2. | 3.1.* -> no matching package found.
• yiisoft/yii2-bootstrap 2.0.3 requires bower-asset/bootstrap 3.3. | 3.2. | 3.1.* -> no matching package found.
• yiisoft/yii2-bootstrap 2.0.2 requires bower-asset/bootstrap 3.3. | 3.2. | 3.1.* -> no matching package found.
• yiisoft/yii2-bootstrap 2.0.1 requires bower-asset/bootstrap 3.3. | 3.2. | 3.1.* -> no matching package found.
• yiisoft/yii2-bootstrap 2.0.0 requires bower-asset/bootstrap 3.2. | 3.1. -> no matching package found.
• Installation request for yiisoft/yii2-bootstrap * -> satisfiable by yiisoft/yii2-bootstrap[2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 2.0.6, 2.0.7, 2.0.8].

Potential causes:

• A typo in the package name
• The package is not available in a stable-enough version according to your minimum-stability setting see https://getcomposer.org/doc/04-schema.md#minimum-stability for more details.
• It's a private package and you forgot to add a custom repository to find it

Read https://getcomposer.org/doc/articles/troubleshooting.md for further common problems.

[fancyecommerce]

这个也是网络问题，可以google一下