Creative Cloud: I got a new license for Adobe Product. When I click "Manage Group" on the web-site I see it in my Work Group, but when I destinate user and he accepts invitation, he doesn't change status. It is still "Waiting user", "The invitation w

Hello! I' ve got some problems with Creative Cloud: I got a new license for Adobe Product. When I click "Manage Group" on the web-site I see it in my Work Group, but when I destinate user and he accepts invitation, he doesn't change status. It is still "Waiting user", "The invitation was send" and that's all. What am I doing wrong ? Thank you!