Expression Evaluation Error - Appian Upgrade 21.3

[evaluation ID = bfc87:b5c51] : Expression evaluation error : The function 'isusermemberofgroup' is unavailable. (APNX-1-4198-000)

Has anyone getting this error after Appian upgrade to 21.3.
I checked in the code where ever isusermemberofgroup function was used it is now appearing as isusermemberofgroup_21r2, still for some user we are seeing above error.

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