[QuickSight] Cannot add users to a group

Hi everyone,

I've added some users throught both IAM and email to quicksight, and I have created a group. But I cannot add users to my group :

• I go to Manage Group (in the right region)
• I select the group, and write their name / email address in the "Add user" field
• It searches, and ends up finding no user

Do you have any idea why this is occurring ?

Thanks in advance, Allan