Microsoft To Do not working

Hello,

My Microsoft To Do application is not working since I bought Office 365 Personal.

The app shows a message "Gettings tasks list ready..." and it loads indefinitely.

I tested on Windows application Microsoft To Do, Web application on Edge, Chrome or Firefox via https://to-do.live.com, Microsoft To Do application on iOS or Android, and also on different computers.

It seems that my account is broken...

The Microsoft support gave me the following ticket number 7091736234

Anyone can help me to solve this issue ?

Thank you