To resolve this issue, follow these simple steps.
Open Admin Tool.
Go to the Organisation.
Select Amend option.
Click Service Provision tab of the pop-up box.
Click Service Type Group/Service Type line.
When the line is highlighted, click Amend button on the pop-up.
Proceed to the next step by clicking Next on Service User Group pop-up.
Now On the Element Types screen:
Find the Element Type on the left side of Available Types.
Using the arrow button move it to the right-hand side of Selected Types.
Click Finish.
Confirm by clicking OK.
Now that you have the config, go back to the step and continue your work.