why I can't open tell any more in my Mac book ?

[Nisreen Baitalmal]

when I open Trello from my laptop as usual its open empty white board.  I every thing to fix this put I can't use Trello any more 

[Oliver S]

Hi Nisreen, welcome to the community! :)

Sounds strange! Are you able to run through some of our suggestions in this doc to see if you're able to get things back to normal? - https://support.atlassian.com/trello/docs/troubleshooting-for-the-desktop-app-windows-and-macos/ - Specifically:

• Force quit and reopen the app using Cmd+Q
• Check if the same thing happens while connected to a different network (e.g. Hotspot from your phone)
• Reset local data (clear cache) on the app. This can sometimes help.
• Remove and reinstall the app

Let me know how things go!