We encountered an unhandled error: It is impossible to assign a value to the property '_showWarnings' of the object '#<Object>'

Looking to implement SSR on my current website. Angular version: v8 Followed the instructions from this link: https://angular.io/guide/universal

  [error] TypeError: Cannot assign to read only property '_showWarnings' of object '#<Object>'
    at TapSubscriber._tapNext (E:\pro\Git\pro\node_modules\@angular\cli\node_modules\@angular-devkit\core\src\json\schema\visitor.js:56:210)
    ... (remaining error messages omitted for brevity) ...
    at MergeMapOperator.call (E:\pro\Git\pro\node_modules\@angular\cli\node_modules\rxjs\internal\operators\mergeMap.js:39:23)
angularserver-side-rendering

Answer №1

Here are the steps you can take to resolve the error:

  1. Start by installing the specified node package version.

install npm package @angular-devkit/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="86e4f3efeae2abe7e8e1f3eae7f4c6b6a8beb6b5a8b3">[email protected]</a>

  1. Next, attempt to build using the command below:

npm build:ssr

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