AspNetBoilerplate REACT template - error after npm start

问题

Today I downloaded the ABP Asp.Net Core REACT SPA template. After downloading, I ran npm install and then npm start. These two steps worked, no issues. Once the REACT app has started, the browser opens up and all I get is a blank page. Then after a few seconds the below error dialog box comes up. When I look at the chrome console, I find the errors shown below. I'm new to REACT and very much still learning it. So I could use some help in tracking this error down. Please note I did run the migrator project and got the DB setup on my PC and updated the connection strings to ensure connectivity for the .NET code.

回答1:

Follow steps below to check whether you miss any step:

1. VS 2019 Open abp project
2. Change YourProjectName.Web.Host -> appsettings.json -> ConnectionStrings.Default
3. From VS 2019 PMC, set YourProjectName.EntityFrameworkCore as Default Project
4. Run update-database which will create the database
5. Set YourProjectName.Web.Host as Start Project, and run YourProjectName.Web.Host
6. For expected result, you will get http://localhost:21021/swagger/index.html
7. CD reactjs folder and run npm install and npm start
8. http://localhost:3000/user/login will show up.

来源：https://stackoverflow.com/questions/57548200/aspnetboilerplate-react-template-error-after-npm-start