Declaration of Symfony\Component\Translation\TranslatorInterface::setLocale($locale) must be compatible with Symfony\Contracts\Translation\LocaleAwareInterface::setLocale(string $locale)
"require": {
"php": "^7.2",
"encore/laravel-admin": "^1.7",
"fideloper/proxy": "^4.0",
"laravel/framework": "^6.2",
"laravel/tinker": "^2.0",
"symfony/translation": "4.3.8" //加这行 再 composer update
},
原文：https://www.cnblogs.com/JANCHAN/p/12782087.html