Bug Report: Stitch projects fail to load and create due to console network and JavaScript exceptions

Stitch
1

I am experiencing a critical issue where the Google Stitch platform fails to load my existing projects (showing “Failed to load projects” in the sidebar) and fails to create any new projects (throwing “Failed to create project. Please try again later” toast notification).

Upon inspecting the Chrome Developer Console, I found several network and uncaught JavaScript runtime exceptions that prevent the application from communicating with the backend.

Console Errors:

  1. Network Error: Failed to load resource: net::ERR_CONNECTION_CLOSED for https://www.googletagmanager.com and related resources.

  2. Unhandled JavaScript Exceptions:

    • Failed to load user settings: in util-DQh63Br1.js:178

    • Failed to update user settings: in util-DQh63Br1.js:178

    • Failed to save default privacy settings: in util-DQh63Br1.js:178

    • Multiple occurrences of WIZ bundle errors: Error: gd at d9 (m=oxe1Cc:728:66) within generator promises.

2

What can I do, already one month

3

HI!

I have same trouble.
How can i avoid it?

4

Hey @Donegal, sorry for the trouble. Looking at the diagnostics you provided, an upstream or localized network drop is triggering the ERR_CONNECTION_CLOSED exception on the background runtime scripts, preventing core dependencies from executing.

Please execute the following client-side remediation steps:

  • Disable Content Filtering: Completely whitelist Stitch in any active extension layers (e.g., uBlock Origin, AdBlock, Privacy Badger, or Brave Shields) to ensure background requests aren’t prematurely terminated.

  • Force Cache Invalidation: Clear the local corrupted state by performing a hard refresh via Cmd + Shift + R (Mac) or Ctrl + F5 (Windows).

  • Isolate the Network Layer: If the steps above fail, temporarily switch from your current local Wi-Fi or corporate network to a mobile data hotspot. This rules out router-level configuration issues, firewalls, or custom DNS blocks (like Pi-hole).

Let me know if any of these do the trick. Thanks for working through this with us!

5

Hey @EgorGan, could you also please try the troubleshooting steps mentioned above and let me know if they work for you? Please note that this issue can occur if you are trying to access Stitch from an unsupported country or while using certain VPN configurations. Thanks