It often happens that my clients can not connect with me using the link I send because they get the

[Sardinia]

It often happens that the person I send the zoom link cannot access the meeting. They  say that they get the notification that the host (me) is in another meeting....where I am not! I am there waiting for them....and there is no way to solve the problem other than deleting everything and tell my guest to wait for another link via email. This way works but it causes embarrassment and waste of time. Can anyone help me to understand why this happens? Thank you