This issue is most likely related to the @redocly/developer-portal package (tried versions 1.1.0-beta.118 and 1.1.0-beta.120) which is the only dependency of this package.
I am following the docs here.
For the first time, I was able to successfully install and run the development server with no issues. However, when I stopped the server and tried to run it once again, I got the following error:
C:\Users\...\redoclydeveloperportal\node_modules\yoga-layout-prebuilt\yoga-layout\build\Release\nbind.js:53
throw ex;
^
Error: read ECONNRESET
at TCP.onStreamRead (node:internal/stream_base_commons:213:20)
Emitted 'error' event on Socket instance at:
at emitErrorNT (node:internal/streams/destroy:188:8)
at emitErrorCloseNT (node:internal/streams/destroy:153:3)
at processTicksAndRejections (node:internal/process/task_queues:80:21) {
errno: -4077,
code: 'ECONNRESET',
syscall: 'read'
}
error Command failed with exit code 7.

From what I have tested yarn start starts the development server successfully only once after a computer restart. Every other try ends up with the above-mentioned error.
Running on Windows 10.
I tried to install and run this package on various Node.js versions: 14.15.1, 15.5.1, 16.10.0.
I also tried to run yarn clean, remove the yarn.lock file and the node_modules folder and reinstall everything. No luck at all.
I found out that the issue might be related to the gatsby or gatsby-cli packages. However, I could not find any reliable fix.
So you probably came across this issue and could assist?