Can't add New Work Items from the Sprint View in Boards

Question

Host Details:

OS Editon: Azure Devops server 2016
OS Build: 1607

Azure DevOps Details:

AZ server: 2019

The issue:

For one Team Project, we are requiring to have three different sub-area paths so we can place work accordingly for each team Properly to follow it. The three sub-areas were created as follow:

and visible are visible from Bords:

But, and here the issue, the Button for creating New Work Item now is Disabled, as shown below:

Also

How could re-enable this button? We use this button at daily basis to create New Tasks or as required, is so weird that enabling one functionality we lost other.

Answer 1

Solved each team is an independent unit and for that each will have their own setup,

Once that is corrected all works fine