Hi @Joan Saadoun ,
According to my research, this seems to be an issue that started happening recently, and it will be fixed by next scheduled update.
For admin, you can check the Service health in M365 admin center for issue EX648854 if there it is:
https://portal.office.com/adminportal/home?#/servicehealth/:/alerts/EX648854
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.