Facing "Unsupported type class java.util.LinkedHashMap in setFieldOptions()" error

[Richa Rajaram Aware]

We have request like we need to pop the users from specific user group in "User Picker (Single User)" field based on the another drop down fields option. So I have tried it with below script but getting  "Unsupported type class java.util.LinkedHashMap in setFieldOptions()" error while executing it. 

import com.atlassian.jira.component.ComponentAccessor

def userUtil = ComponentAccessor.getUserUtil()

def currentUser = ComponentAccessor.getJiraAuthenticationContext().getLoggedInUser()

def userManager = ComponentAccessor.getUserManager()

def groupManager = ComponentAccessor.getGroupManager()

// def field = getFieldById("customfield_36450")

// Get the form fields

def regardingField = getFieldById("customfield_27500") // The field to check

def userPickerField = getFieldById("customfield_35100") // The user picker field

// Get the value of the regarding field

def regardingValue = regardingField.getValue()

// Check the value and restrict the user picker field based on the group

if (regardingValue == "AUTO AD") {

    def group = groupManager.getGroup("MU Tech_Auto AD")

    def groupMembers = groupManager.getUsersInGroup(group)

    def userOptions = groupMembers.collect { [id: it.key, name: it.displayName] }

    userPickerField.setFieldOptions(userOptions)

} else {

    userPickerField.setFieldOptions([]) // Or some default options

}

We are using Jira Data Center Version 8.20.30

Please check and support me while resolving this error.

Thank You!

Best Regards,

Richa Aware

[Richa Rajaram Aware]

Hello, 

Is there any update for above request?

Best Regards,

Richa Aware