Message&trace:

Generating browser application bundles (phase: building)...(node:5312) UnhandledPromiseRejectionWarning: TypeError: MessagePort was found in message but not listed in transferList
    at new Worker (internal/worker.js:170:17)
    at SassWorkerImplementation.createWorker (C:\Users\shail\iacademiaApp1\node_modules\@angular-devkit\build-angular\src\sass\sass-service.js:96:24)
    at SassWorkerImplementation.render (C:\Users\shail\iacademiaApp1\node_modules\@angular-devkit\build-angular\src\sass\sass-service.js:62:40)
    at Object.loader (C:\Users\shail\iacademiaApp1\node_modules\sass-loader\dist\index.js:46:3)
(node:5312) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:5312) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:5312) UnhandledPromiseRejectionWarning: TypeError: MessagePort was found in message but not listed in transferList
    at new Worker (internal/worker.js:170:17)
    at SassWorkerImplementation.createWorker (C:\Users\shail\iacademiaApp1\node_modules\@angular-devkit\build-angular\src\sass\sass-service.js:96:24)
    at SassWorkerImplementation.render (C:\Users\shail\iacademiaApp1\node_modules\@angular-devkit\build-angular\src\sass\sass-service.js:62:40)
    at Object.loader (C:\Users\shail\iacademiaApp1\node_modules\sass-loader\dist\index.js:46:3)
(node:5312) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
/ Generating browser application bundles (phase: building)...