How get Dynamic values for module list using three(url,username and access key ),getting facing error {"code":"ACTION_ERROR","description":"Action execution failed with: unexpected null"}^@

[Anonymous]

Hi All,

I am going to create CRM input component.In this component passing four parameters (URL,username,Access key and Module ) for  extract data from crm  module.But module parameter shows list of module like drop down,first three parameters configured in @Datastore and Module parameter configured in @dataset. I have added test button for test the connection using first three credentials using @Checkable and @HealthCheck annotations.once we get connection then we need to select module name from the list.But this list need to generates dynamically using three parameters.Now test button is working perfectly using parameters, but not generating  module list as per three parameters  facing null pointer exception as per below screen shots.hope I will get perfect solution from our community members.

Error Message:-

An error has occurred. See error log for more details.
MESSAGE
status: 520
Content-Type: application/json
Date: Thu, 07 Mar 2019 07:16:02 GMT

{"code":"ACTION_ERROR","description":"Action execution failed with: unexpected null"}^@

thanks,

venkat