Web Test Runner TypeError: Failed to fetch dynamically imported module

[Tharunkumararela]

Using Angular CLI 17.3.7 version

Steps

Inside the package.json file
"scripts":{
"test:wt": "web-test-runner --config  projects/project1/web-test-runner.config.mjs"

}

Install "@web/test-runner": "0.18.0"

web-test-runner.config.mjs Code
export default{
files:' projects/project1/src/**/*.spec.ts',
nodeResolve:true
};

While running inside the terminal by this command npm run test:wt getting error below.

Browser logs:
TypeError: Failed to fetch dynamically imported module:http://localhost:8000/src/app/test.spec.ts
Could not import your test module . Check the browser logs or open the browser in debug mode
Error while running tests.

I can not get web-test-runner to get work and I am not sure where the fault lies.