Compile error after changing branch and running the application

[msnitish]

After I checkout to branch-0, I have run the command:

npm start

and the error which is displayed in the browser is the following :

Failed to compile.

Error in ./src/reportWebVitals.js
Syntax error: 'import' and 'export' may only appear at the top level (3:4)

  1 | const reportWebVitals = onPerfEntry => {
  2 |   if (onPerfEntry && onPerfEntry instanceof Function) {
> 3 |     import('web-vitals').then(({ getCLS, getFID, getFCP, getLCP, getTTFB }) => {
    |     ^
  4 |       getCLS(onPerfEntry);
  5 |       getFID(onPerfEntry);
  6 |       getFCP(onPerfEntry);

 @ ./src/index.js 19:23-51

Are we supposed to edit any parts of code to be able to run correctly ?
I was using the repository as a tutorial.

Thank You