an error is reported when creating a Vue item: error command failed: Yarn. Let's start coding of building to do app with Vue 3 Typescript! <stdin>:1:1829: ERROR: The symbol "e" has already been declared <stdin>:1:1831: ERROR: The symbol "t" has already been de. Once the project is created, Solution . # Create a new Vue project vue create myapp cd myapp # start your app by running the following command npm run serve. Select the path and click Edit. The Complete Guide to Vue.js User Authentication with Auth0 In order to solve this problem, you should add the Vue path to your environment variable manually. In this tutorial, we'll first walk through an introduction to TypeScript, then we'll get into applying TypeScript on a Vue project. It cannot connect because of the proxy, that is expected and won't ever work. Step 5: Vue Fetch HTTP GET. Creating project in D:\xammp7.2\htdocs\t\t. Initializing git repository. I don't know why this is happening but for me it helped when having such issues while creating a new project. The document on npm reads as follows: If you don't see it, create one. vue create my-vueapp #vue create folder-name . How to Add Authentication to a Vue App Using Firebase I did exactly what is in the link you provided in Attempt 3. Step 4: Vue Axios HTTP GET. Error Running Mocha Unit Tests on Vue Project With GraphQL to accept an incorrect (and potentially broken) dependency resolution. The document on npm reads as follows: @anon10222554 I actually ended up using vue-i8n because I found it easier to work with. I found this article very helpful. Luckily for us Vue developers, we can easily add Firebase to our Vue app. How to configure Webpack 4 with VueJS : a complete guide