Troubleshooting

Fix Chrome Aw, Snap Error Code 5

If OmniCanvas opens in Incognito but crashes in your normal browser window, the most likely cause is stale browser app storage, a stuck service worker, or corrupted cached app data in that Chrome profile.

Start with the safe steps

Clearing all site data can remove notes that only exist locally on that browser. If you use cloud sync and see Synced just now, your notes can be restored after signing in again. If you are not sure, try the cache and service worker steps first.

Confirm it is profile-specific

  1. 1

    Open OmniCanvas in Incognito

    In Chrome, open an Incognito window and visit https://app.omnicanvasnotes.com.
  2. 2

    Check whether the app loads

    If Incognito loads but your normal window shows Aw, Snap or Error code 5, your Chrome profile has stale or damaged local app data.
  3. 3

    Do not clear data yet if you have unsynced notes

    If you recently worked offline or are not signed in, avoid clearing all site data until you have confirmed your notes are synced or exported.

Safe recovery: refresh cached app code

  1. 1

    Open the normal Chrome tab

    Use the regular browser profile that is crashing, not Incognito.
  2. 2

    Open DevTools

    Press Cmd+Option+I on Mac or Ctrl+Shift+I on Windows/Linux.
  3. 3

    Unregister the service worker

    Go to Application > Service Workers, then click Unregister for OmniCanvas if a service worker is listed.
  4. 4

    Clear Cache Storage only

    In Application > Cache Storage, delete OmniCanvas cache entries. This refreshes the app shell without deleting IndexedDB notes.
  5. 5

    Hard reload

    Reload with Cmd+Shift+R on Mac or Ctrl+Shift+R on Windows/Linux.

If the page still crashes

  1. 1

    Verify your notes are synced

    If OmniCanvas loads in Incognito after signing in and your notes are present, your account data is safely available from cloud sync.
  2. 2

    Delete site data for OmniCanvas

    In the normal Chrome profile, click the icon to the left of the address bar, open Site settings, then choose Delete data or Clear data for OmniCanvas.
  3. 3

    Reload and sign in again

    Return to https://app.omnicanvasnotes.com, sign in, and wait for sync to restore your library.

Installed app or desktop shell

If the installed OmniCanvas app window shows Can't open this page, first open https://app.omnicanvasnotes.com in the browser profile that installed it and follow the steps above.

For local development builds, make sure the Vite dev server is running on the URL configured by the desktop shell before opening the app window.

Mobile browsers

On iPhone or iPad, remove the Home Screen app shortcut, clear OmniCanvas website data in Safari settings, then open the site and add it back to the Home Screen.

On Android Chrome, open Chrome site settings for OmniCanvas, clear storage, then reopen the app and sign in again.

What OmniCanvas does automatically

Newer OmniCanvas releases include a boot recovery check. If the app detects that the previous load failed before startup completed, it attempts a one-time cleanup of app shell caches and service workers. It does not delete notes, folders, local IndexedDB data, or account data.