I have created the SPFx Project with extension and Web parts. It is working well if I run gulp serve. If I refresh the browser page it is not loading.

It throws an error. If I copy the same URL without any changes in code/URL to the new tab of the page app working well for the first time.


"Custom action component ids are specified by query parameters but matching manifests cannot be found. Ids: a39bcc81-468a-46f7-8abe-862f6ade621e".

Browsers that I Checked:

  • Chrome
  • Edge
  • IE
  • Firefox

All above mentioned browsers are throwing an error for the second time, if page refresh. This problem occurs after the development of ListViewCommandSet extension (separate project).

Also, developer tool does not load the webpack folder for second time. I have also unstall browser and re-installed it(Chrome).But no luck.

Can any one help me to fix this?

1 Answer 1


This currently looks to be a bug from Microsoft end. Multiple bugs have been logged for this issue. Here's one thread, that I'm following: https://github.com/SharePoint/sp-dev-docs/issues/5385

Meanwhile, as an alternative, you can add the below line in your onInit().

sessionStorage.setItem("spfx-debug", "");
  • @Mohammed Rayan - Thanks for your help!!. Commented Mar 3, 2020 at 11:46

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