Note does not sync

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  vavoor · Member · March 9, 2026 at 7:49 am

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  One note does not sync. The screen shot above shows the Javascript errors that probably indicate the problem. Any idea how to solve th eissue?

  Thanks!

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  johnswift37 · Member · March 9, 2026 at 11:31 am

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  Hi. Please identify the host OS and Simplenote app or browser that you’re using.

  If you edit other notes, do they sync without difficulty?

  Make sure you can reach simperium.com by trying to open it in a browser. That’s the cloud service used by Simplenote. You won’t be able to log in there, but you should see the welcome screen.

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  jenhooks · Staff · April 8, 2026 at 9:33 pm

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  Hello @vavoor!

  Thanks for the screenshot. It looks like most of these are being caused by a Chrome browser extension rather than Simplenote itself. Specifically:

  • The “Could not establish connection” and “message port closed” errors come from a Chrome extension’s content script
  • The “Failed to execute ‘put’ on ‘Cache’: Request scheme ‘chrome-extension’ is unsupported” error shows an extension interfering with Simplenote’s service worker
  • The “WebSocket is already in CLOSING or CLOSED state” error is likely the direct cause of your sync issue – the connection to the Simplenote sync server is being interrupted

  Here’s what I recommend next:

  1. Try opening Simplenote in a Chrome Incognito window (Ctrl+Shift+N). Extensions are disabled by default in Incognito mode, so this will confirm whether an extension is causing the problem.
  2. If it works in Incognito, disable your Chrome extensions one by one to find which one is interfering. Ad blockers, privacy extensions, and VPN extensions are common culprits.
  3. Alternatively, try a different browser (Firefox, Edge, etc.) to see if the note syncs there.

  Let us know how it goes. :)