Express Started but error occurred when execute in browser or api

[Selvi-winvest]

I have followed all the steps which is mentioned. I can see the form builder and preview but api/formdata error..

Express is started but can't execute in browser..

npm run serve:api
react-form-builder2@0.5.14 serve:api F:\Angular\react-form-builder
node server/index.js
Express started on http://localhost:5005; press Ctrl-C to terminate.

Below Error
Error: F:\react-form-builder\server\views\404.ejs:2 1| <% include error_header %> >> 2|

Cannot find <%= url %>

3| <% include footer %> url is not defined
An error occurred!

Please suggest how to resolve this.