Error when performing Apply Template and UI generation of Process

Dear Experts,

I was very new to SAP BPM space. In the days to come , I will be assigned to BPM scenarios.. this made me to start practicing the scenario shared by Steffen Ulmer... My Name and Age example.

My BPM instance is coupled with PI 7.4 i.e. SAP PO and I an using the NWDS version SP11

After  the creation of the data object , when I am trying to Apply the Template and then Assigning UI of process, its generating 2 error .

1.Assign a potential owner to human activity

2. Assign a UI component to task.

I tried creating several times even under new work space but all the time its the same result.

Please suggest what wrong I am doing.

Regards

Rebecca