Unable to open GDevelop Cloud project - Error occurs on multiple devices

GDevelop general Bugs reports
1

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I am trying to open my project named “KMIPN 2026” which is saved on the GDevelop Cloud. I am logging into my account (vmax4you99@gmail.com) via the GDevelop web editor.

To make sure it wasn’t just my computer, I asked my teammates to log into the same account from their own devices and networks to at least backup the project, but they are encountering the exact same issue.

What is the expected result
The project “KMIPN 2026” should open normally in the GDevelop editor so we can continue working on it. Since it’s a cloud project, it should sync and load the latest save from the server without any issues.

What is the actual result
When I click on the project to open it, a popup appears with the following message:
“Unable to open the project. An error occurred when opening the project. Check that your internet connection is working and that your browser allows the use of cookies.”

Because the error persists across multiple devices and networks, I strongly suspect this is not a local browser/cookie issue, but rather a corruption, sync issue, or a bug with the project file on the GDevelop Cloud server itself.
This is extremely urgent. This project is for a major national student competition in Indonesia (KMIPN 2026), and we are on a very strict deadline. Losing access to this project would be devastating for our team.

Could the development team please check the server logs or the cloud storage for this specific project? Any assistance to recover or unlock this project would be highly appreciated. Thank you!

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2

Hi, let me double check your account and this project and come back to you.

3

I’ve checked and your project on the cloud servers is healthy, including the very latest version.
So this is not corruption or a lost save. The problem is happening earlier, when your browser tries to authorize the download.

To pinpoint it, could you do a quick check in Chrome?

  1. Open the GDevelop editor page (don’t click the project yet).

  2. Press F12 (or right-click → Inspect) to open DevTools, and click the Network tab at the top.

  3. Make sure recording is on (the round dot top-left of that tab should be red) and tick Preserve log.

  4. In the Filter box, type gdevelop.io.

  5. Now click the project to open it and let the error appear.

  6. In the request list, find and click these two rows:

    • authorize — click it, go to the Headers sub-tab, and look under Response Headers for a line starting set-cookie: gd_resource=…. Tell me if it’s there, and whether there’s a small :warning: warning icon next to that cookie.

    • …/versions/….zip — click it and tell me the Status shown at the top of its Headers tab (e.g. 200, 403, or 404). Also check its Request Headers for a Cookie: line and whether it contains gd_resource.

A screenshot of both is fine too. Thanks!