<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> I have searched the <a href="https://github.com/zeit/next.js/issues">issues</a> of this repository and believe that this is not a duplicate.</li>
</ul>
<h2 dir="auto">Steps to Reproduce (i don't know if bugs)</h2>


<ol dir="auto">
<li>Upgrade to version 5 of next</li>
<li>In dev mode the terminal tells me the 404 error of the js source map</li>
<li>Keep running my application, but the message bothers me, I do not know if it's ok</li>
</ol>
<h2 dir="auto">Context</h2>


<p dir="auto">My big mental problem, is not knowing if this is a normal behavior or I have something wrong with my next application configuration or in the browser.<br>
Terminal:</p>
<p dir="auto">DONE  Compiled successfully in 3408ms<br>
"GET /_next/-/manifest.js.map HTTP/1.1" 404 Chrome/63.0.3239.132 Safari/537.36<br>
"GET /_next/-/commons.js.map HTTP/1.1" 404 Chrome/63.0.3239.132 Safari/537.36<br>
"GET /_next/-/main.js.map HTTP/1.1" 404 Chrome/63.0.3239.132 Safari/537.36</p>
<h2 dir="auto">Your Environment</h2>

<table role="table">
<thead>
<tr>
<th>Tech</th>
<th>Version</th>
</tr>
</thead>
<tbody>
<tr>
<td>next</td>
<td>v5.0.0</td>
</tr>
<tr>
<td>node</td>
<td>v8.9.4</td>
</tr>
<tr>
<td>OS</td>
<td>macos sierra</td>
</tr>
<tr>
<td>browser</td>
<td>google chrome</td>
</tr>
</tbody>
</table>
<h1 dir="auto">Bug report</h1>
<h2 dir="auto">Describe the bug</h2>
<p dir="auto">Hello, I'm getting this error trying run <strong>yarn build</strong>. I want to deploy to now.sh my ssr app with firebase and antd. I tried <strong>npm i &amp;&amp; npm rebuild &amp;&amp; npm run build</strong> but it didn't work.</p>
<p dir="auto">Solutions to another issues have not working.</p>
<blockquote>
<p dir="auto">gitpod /workspace/shopping $ yarn build<br>
yarn run v1.16.0<br>
warning package.json: No license field<br>
$ next build<br>
Creating an optimized production build ...</p>
<p dir="auto">Using external babel configuration<br>
Location: "/workspace/shopping/.babelrc"<br>
Compiled with warnings.</p>
<p dir="auto">./node_modules/bytebuffer/dist/bytebuffer-node.js<br>
Module not found: Can't resolve 'memcpy' in '/workspace/shopping/node_modules/bytebuffer/dist'</p>
<p dir="auto">Build error occurred<br>
{ Error: The gRPC binary module was not installed. This may be fixed by running "npm rebuild"<br>
Original error: Cannot find module './assets/src/node/extension_binary/node-v64-linux-x64-glibc/grpc_node.node'<br>
at Object.L/Cg (/workspace/shopping/.next/serverless/pages/index.js:48582:17)<br>
at <strong>webpack_require</strong> (/workspace/shopping/.next/serverless/pages/index.js:23:31)<br>
at Object.7noQ (/workspace/shopping/.next/serverless/pages/index.js:7759:12)<br>
at <strong>webpack_require</strong> (/workspace/shopping/.next/serverless/pages/index.js:23:31)<br>
at Object.cJE4 (/workspace/shopping/.next/serverless/pages/index.js:62556:27)<br>
at <strong>webpack_require</strong> (/workspace/shopping/.next/serverless/pages/index.js:23:31)<br>
at Object.z77n (/workspace/shopping/.next/serverless/pages/index.js:75069:14)<br>
at <strong>webpack_require</strong> (/workspace/shopping/.next/serverless/pages/index.js:23:31)<br>
at Object.BYZf (/workspace/shopping/.next/serverless/pages/index.js:12181:12)<br>
at <strong>webpack_require</strong> (/workspace/shopping/.next/serverless/pages/index.js:23:31) code: 'MODULE_NOT_FOUND' }<br>
error Command failed with exit code 1.<br>
info Visit <a href="https://yarnpkg.com/en/docs/cli/run" rel="nofollow">https://yarnpkg.com/en/docs/cli/run</a> for documentation about this command.</p>
</blockquote>
<h2 dir="auto">To Reproduce</h2>
<p dir="auto">Steps to reproduce the behavior, please provide code snippets or a repository:</p>
<ol dir="auto">
<li>Clone this <a href="https://github.com/skaptox/grpc-issue">repo</a></li>
<li>yarn &amp;&amp; yarn build</li>
<li>See error</li>
</ol>
<h2 dir="auto">System information</h2>
<ul dir="auto">
<li>OS: [e.g. Linux]</li>
<li>Version of Next.js: 9.0.0</li>
<li>Node v10.15.3</li>
</ul>