[BUG]The file is missing necessary properties for a diagram.

[keeleycenc]

Describe the bug
When importing a JSON file that was created and exported from one computer (Computer A) into the editor on another computer (Computer B), the import fails with the error message: "The file is missing necessary properties for a diagram." Both computers have identical hardware and software configurations.

To Reproduce
Steps to reproduce the behavior:

1. On Computer A, go to 'https://www.drawdb.app/editor'.
2. Create a new diagram.
3. Export the diagram as JSON.
4. On Computer B, go to 'https://www.drawdb.app/editor'.
5. Click on 'Import' -> 'JSON'.
6. Select the exported JSON file from Computer A.
7. See error: "The file is missing necessary properties for a diagram."

Expected behavior
The JSON file should be successfully imported and the diagram should load correctly in the editor without any error messages.

Screenshots

Desktop (please complete the following information):

• OS: Windows (64-bit operating system, based on x64-based processor)
• Browser: Google Chrome 138.0.7204.169

Additional context

显卡数据采集_2025-10-09T03_27_12.728Z (1).json

This issue occurs with the import feature

[keeleycenc]

They can't even open their own JSON