错误截图：

在运行npm start的react项目时，它显示与contentful.js相关的错误。软件包为什么会显示这些类型的错误？我在此帖子中附有屏幕截图。如何解决这个问题？

.env文件

CONTENTFUL_accESS_TOKEN: process.env.REact_APP_CONTENTFUL_accESS_TOKEN,

配置文件

import SETTINGS from "../env";
const contentfulClient = contentful.createclient({
  space: SETTINGS.CONTENTFUL_SPACE,accessToken: SETTINGS.CONTENTFUL_accESS_TOKEN
});

我需要在任何地方输入api令牌吗？

.env

const SETTINGS = {
  LANDING_BLOG_POSTS: "",ICON_TYPE: "svg",CONTENTFUL_SPACE: process.env.REact_APP_CONTENTFUL_SPACE,CONTENTFUL_accESS_TOKEN: process.env.REact_APP_CONTENTFUL_accESS_TOKEN,CLOUDINARY_UNSIGNED_PRESET: process.env.REact_APP_CLOUDINARY_UNSIGNED_PRESET,CLOUDINARY_CLOUD_NAME: process.env.REact_APP_CLOUDINARY_CLOUD_NAME,SERVER_7CHIP: process.env.REact_APP_SERVER_7HIP || false,HARD_CODED_username: process.env.REact_APP_TOKEN_username || "**********",HARD_CODED_PASSWORD: process.env.REact_APP_TOKEN_PASSWORD || "************",FACEBOOK_API_ID: process.env.REact_APP_FACEBOOK_APP_ID,FACEBOOK_PAGE_TOKEN: process.env.REact_APP_FACEBOOK_PAGE_TOKEN,FACEBOOK_PAGE_ID: process.env.REact_APP_FACEBOOK_PAGE_ID || "**************",FACEBOOK_SERVER_CALL: true
};
export default  SETTINGS;