将Magento 2.1.5升级到2.2.6后,出现以下错误。我的magento源代码位于子目录,如www.mysite.com/staging /
/ staging / vendor / mailchimp / mc-magento2 / registration.php:12堆栈跟踪:#0
/ staging / vendor / composer / autoload_real.php(71):require()#1
/ staging / vendor / composer / autoload_real.php(61):composerRequiref4386a435c9f0af056695f7999d4c05d('62008ed0ff26c9a ...','/ var / www / vhosts ...')#2#/ staging / vendor / autoload.php(7 ):ComposerAutoloaderInitf4386a435c9f0af056695f7999d4c05d :: getLoader()#3
/ staging / app / autoload.php(30):include('/ var / www / vhosts ...')#4
/ staging / app / bootstrap.php(30):require_once('/ var / www / vhosts ...')#5
staging / index.php(22):require('/ var / www / vhosts ...')#6 {main}抛出
/ staging / vendor / mailchimp / mc-magento2 / registration.php,第12行