You may not have joined a team even if you have already been notified that you have created an account in the account to which you have invited the team.
In the following cases, when you access Jicoo from the invitation email, you may already be logged into a team that has already been created.
You already have an account and are logged into Jicoo
Solution
Make the following announcement to the invitees and ask them to open the link in the invitation email while logged out.
With the invitee logged out of Jicoo, access Jicoo from the invitation email to create an account.
Logout can be found at the bottom of this page.
Why you need to log out
If you open the invitation email while logged into Jicoo, you will be logged into an existing team and will not be able to create a new account.