ReactNative0.64命令PhaseScriptExecution失败，退出代码非零

我正在安装一个带有React Native 0.64模块的新项目。我可以毫无问题地进行pod 安装，但是当我想让我的应用程序运行时（使用 react-native run-ios 或使用 XCode）在XCode 上发生此错误：

/Users/thomas/Desktop/Dev/Mobile/appname/node_modules/react-native/scripts/generate-specs.sh: line 27: readlink: command not found
/Users/thomas/Desktop/Dev/Mobile/appname/node_modules/react-native/scripts/generate-specs.sh: line 27: dirname: command not found
/Users/thomas/Desktop/Dev/Mobile/appname/node_modules/react-native/scripts/generate-specs.sh: line 27: cd: : No such file or directory
Command PhaseScriptExecution failed with a nonzero exit code

这是react-native run-ios 上的一个：

The following build commands failed:
    PhaseScriptExecution [CP-User] Generate Specs /Users/thomas/Library/Developer/Xcode/DerivedData/appname-aqbmfgqjkshyqmaprdvggqaeqjrp/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/**FBReactNativeSpec**.build/Script-A319AA7F2B7AAE771AE63D66A0049241.sh

请注意，我的node_modules/react-native 中没有“ scripts ”文件夹（我只有 assets、normalize-color 和 polyfills 文件夹）。我试图删除节点模块并重新安装它。