反应本机watchman未检测到更改

我使用watchman来检测文件中的更改,但是,出于某种原因,每当REACT组件中缺少CSS时,它就会抛出一个常规错误,而不是缺少CSS元素-

Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports.

操作系统MAC