Incorrect privileges to get groups for user

Hi Guys,

We have a scenario where we have to update a comment in one of the Tabs on screen. When we update the comment using an user from a group and try to login with another user from a different group and when trying to open that comment tab I am seeing the following error. It is working fine in the lower environments. The group Properties are similar in lower and testing environments.

Thanks in Advance.

Logs:

2017-08-14 14:53:46,181 [[ACTIVE] ExecuteThread: '21' for queue: 'weblogic.kernel.Default (self-tuning)'] ERROR com.appiancorp.rest.shared.AppianExceptionMapper - Internal Server Error on REST API invocation.
com.appiancorp.process.expression.ExpressionRuntimeException$AppianExceptionProvider: Expression evaluation error in rule '_addcomments' (called by rules '_viewloanaddcomentsdocuments' > '_viewloanmainscreen') at function 'apply' [line 45]: com.appiancorp.suiteapi.common.exceptions.AppianException: Incorrect privileges to get groups for user. [User Context: np_int_invrepoman1] (APNX-1-4198-000)
    at com.appiancorp.process.expression.ExpressionRuntimeException.<init>(ExpressionRuntimeException.java:70)
    at com.appiancorp.process.expression.ExpressionRuntimeException.<init>(ExpressionRuntimeException.java:66)
    at com.appiancorp.core.expr.fn.looping.LoopingFunction.evaluateList(LoopingFunction.java:43)
    at com.appiancorp.core.expr.fn.looping.LoopingFunction.evaluateList(LoopingFunction.java:32)
    at com.appiancorp.core.expr.fn.looping.Apply.eval(Apply.java:20)
    at com.appiancorp.core.expr.fn.Function.eval0(Function.java:58)
    at com.appiancorp.core.expr.DefaultEvaluable.eval(DefaultEvaluable.java:175)
    at com.appiancorp.core.expr.tree.FunctionCall.evalImmediate(FunctionCall.java:353)
    at com.appiancorp.core.expr.tree.FunctionCall.evalEvaluable(FunctionCall.java:320)
    at com.appiancorp.core.expr.tree.FunctionCall.eval(FunctionCall.java:392)
    at com.appiancorp.core.expr.Tree.eval0(Tree.java:213)
    at com.appiancorp.core.expr.Tree.eval(Tree.java:209)
    at com.appiancorp.core.expr.tree.FunctionCall.evalChildren(FunctionCall.java:176)
    at com.appiancorp.core.expr.tree.FunctionCall.evalImmediate(FunctionCall.java:339)
    at com.appiancorp.core.expr.tree.FunctionCall.evalEvaluable(FunctionCall.java:320)
    at com.appiancorp.core.expr.tree.FunctionCall.eval(FunctionCall.java:392)
    at com.appiancorp.core.expr.Tree.eval0(Tree.java:213)
    at com.app


Caused by: javax.script.ScriptException: com.appiancorp.suiteapi.common.exceptions.AppianException: Incorrect privileges to get groups for user. [User Context: np_int_invrepoman1]
    at com.appiancorp.process.expression.CustomFunction.eval0(CustomFunction.java:183)
    at com.appiancorp.core.expr.DefaultEvaluable.eval(DefaultEvaluable.java:175)
    at com.appiancorp.core.expr.fn.looping.HigherOrderFunction.apply(HigherOrderFunction.java:185)
    at com.appiancorp.core.expr.fn.looping.HigherOrderFunction.apply0(HigherOrderFunction.java:97)
    at com.appiancorp.core.expr.fn.looping.HigherOrderFunction.apply(HigherOrderFunction.java:68)
    at com.appiancorp.core.expr.fn.looping.LoopingFunction.evaluateList(LoopingFunction.java:39)
    ... 275 more
Caused by: com.appiancorp.suiteapi.common.exceptions.AppianException: Incorrect privileges to get groups for user. [User Context: np_int_invrepoman1]
    at com.appiancorp.psshared.peoplefunctions.GetGroupsForMemberUser.getGroupsForMemberUser(GetGroupsForMemberUser.java:32)
    at sun.reflect.GeneratedMethodAccessor1913.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.appiancorp.process.expression.CustomFunction$1.call(CustomFunction.java:758)
    at com.appiancorp.common.ContextClassLoaderSwitcher.runInContext(ContextClassLoaderSwitcher.java:25)
    at com.appiancorp.process.expression.CustomFunction.evaluate(CustomFunction.java:753)
    at com.appiancorp.process.expression.CustomFunction.evalDynamic(CustomFunction.java:204)
    at com.appiancorp.process.expression.CustomFunction.eval0(CustomFunction.java:176)
    ... 280 more
Caused by: PrivilegeException[null=>null]: Insufficient permission
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl