When i try to open file Figma write An error occurred while opening the editor

Hey ​@Екатерина Сиденина , Celine from the Community Support team here. Happy to help!

To start, could you confirm whether this happens across all browsers (like Chrome or Firefox) and in the desktop app as well?

As a first step, I’d recommend clearing your cache and then trying to access the file again.

Desktop app — macOS
You can clear the desktop app cache on a Mac in the Help menu under Troubleshooting.
If you’d prefer to do it manually, you can:

1. Quit the Figma desktop app
2. Open Terminal.app and enter the following command: rm -rf "$HOME/Library/Application Support/Figma"
3. Try opening the desktop app again

Desktop app — Windows 
You can clear the desktop app cache on Windows under the toggle-arrow at the right of the top toolbar under Help > Troubleshooting. If you'd prefer to manually clear your cache you can:

1. Close the Figma desktop app
2. Open the Start menu, and paste in this, followed by enter: %APPDATA%\Figma
3. In the window that opens, delete the Desktop and DesktopProfile folders if they exist
4. Launch the desktop app again

 
If this still does not work, please check if something on your network or system is blocking your connection to Figma.

• Please check your network settings and firewall or anti-virus software to ensure access is allowed to figma.com
• Check your Port 443 was unblocked.
• Try disabling any VPN or proxy server
  You can find more guidance in this article: here.

Let me know how it goes. If the issue continues after trying these steps, I can create a support ticket on your behalf for further investigation.

I have the same problem with this.  I was literally just working on the file, went to the homepage to duplicate the file, then tried to get back into the original file, I just keep getting the same error message.  I am using Safari and it has been fine the whole time. 

Same here

Having the same issue!