Invalid or unexpected token error when starting fastboot server

We have an ember application using the ember-cli-fastboot. During enabling the fastboot on local and running the `server.js` produces a strange error :
```js
/Users/kush/open-event-frontend/dist/assets/open-event-frontend-fastboot.js:1

SyntaxError: Invalid or unexpected token
at new Script (vm.js:86:7)
at VMSandbox.eval (/Users/kush/open-event-frontend/node_modules/fastboot-app-server/node_modules/fastboot/src/vm-sandbox.js:13:22)
at /Users/kush/open-event-frontend/node_modules/fastboot-app-server/node_modules/fastboot/src/ember-app.js:197:15
at Array.forEach ()
at EmberApp.loadAppFiles (/Users/kush/open-event-frontend/node_modules/fastboot-app-server/node_modules/fastboot/src/ember-app.js:194:18)
at EmberApp.retrieveSandboxedApp (/Users/kush/open-event-frontend/node_modules/fastboot-app-server/node_modules/fastboot/src/ember-app.js:235:10)
at new EmberApp (/Users/kush/open-event-frontend/node_modules/fastboot-app-server/node_modules/fastboot/src/ember-app.js:61:21)
at FastBoot._buildEmberApp (/Users/kush/open-event-frontend/node_modules/fastboot-app-server/node_modules/fastboot/src/index.js:114:17)
at new FastBoot (/Users/kush/open-event-frontend/node_modules/fastboot-app-server/node_modules/fastboot/src/index.js:52:10)
at Worker.buildMiddleware (/Users/kush/open-event-frontend/node_modules/fastboot-app-server/src/worker.js:74:21)
[2020-01-15T20:39:14.944Z][m15711] worker exited with error code: 1
[2020-01-15T20:39:14.947Z][m15711] forked worker 15822
[2020-01-15T20:39:14.947Z][m15711] worker online
```
When I tried to see the file `open-event-frontend-fastboot.js`, It has :

It would be great if someone could confirm is the fastboot issue ?