Cannot send invite to the user

[T_riq Perv_z]

Trying to send email to the new project user but system is throwing error 

Checked all the users (active/suspended / deactivated) its name is not there as this is the first time user. 

[Shannon S]

Hello @T_riq Perv_z,

Welcome to the Atlassian Community. It's great to have you here. I understand you receive an error when you try to invite a new user to Confluence.

Can you tell me what error message you are receiving when you try to invite the user?

I look forward to your response.

Shannon S | Atlassian Cloud Support