Your requirements could not be resolved to an installable set of packages.
以上原因:不匹配composer.json要求的版本。
解决方案:
composer可以设置忽略版本匹配,
composer install --ignore-platform-reqs composer update --ignore-platform-reqs
再次执行composer命令可以正常安装包了。
原文链接:https://blog.csdn.net/zhym86848658/article/details/84067065