SharePoint Framework gulp serve localhost sent an invalid response

sharepoint.stackexchange https://sharepoint.stackexchange.com/questions/229254

  •  04-01-2021
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Question

I'm testing a newly created webpart locally using the gulp serve command after launching the gulp trust-dev-cert for certification installation, the local workbench opens up but all browsers are displaying the same error. Here's a screenshot from google chrome :

enter image description here

What I've tried :

  • Disabling firewall

I've googled and googled but with no success.

Does anyone have an idea about what's happening ?

Was it helpful?

Solution

Try to give a look to the tip of Waldek Mastykarz if you are using latest LTS of Node.js here, it solved the issue for me (no need to disable firewall) : https://github.com/SharePoint/sp-dev-docs/issues/1002

OTHER TIPS

For Windows 10, Node version 8.9.1, SPFx version 1.4.0 below is the solution:

Add System variable

Control Panel -> System -> Advanced System Settings -> Environment Variables -> System Variables)

  • Variable name: NODE_NO_HTTP2
  • Variable value: 1

Don't forget to restart terminal.

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