Hi Ketan,
What are the package privileges you have granted? Only REPO.READ should be given .
Object Privileges:
1) SELECT ON _SYS_BI,_SYS_BIC
2) EXECUTE ON REPOSITORY_REST
Package Privileges:
1) REPO.READ on the package
Analytic Privileges:
1) The Analytic Privilege only on that specific models
Can you confirm that you have assigned only the above access?
Regards,
Krishna Tangudu