Talent partner not able to search any employee in sucession plan but able to search in talent review

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Dear All,

We have a problem, while creating incumbent succession plan user is not able to search any employee, but when he search in talent review meeting, he is able to search. 

I know that this is issue with Data role, but we assign all seeded privilege to role still no success. 

1.create scuccession plan for worker
2.manage succession pln candidate
3.succession plan management 
4.view succession plan

Are we missing any configuration in succession? 

Regards

Dev