Search API not working - throwing 204 Error

Search API not working - throwing 204 Error

I'm using Python SDK to search on Contacts Module 

  1. module_ins = ZCRMModule.get_instance('Contacts')
    search_result = module_ins.search_records_by_email(self.email)
    record_ins_arr = search_result.data

it was working but suddenly it's throwing
  204 Response error_content: INVALID_DATA-The given id seems to be invalid.. Error Details::None
Access token is working fine
Scopes are:  ZohoCRM.modules.all,ZohoSearch.securesearch.READ ,Aaaserver.profile.Read

What is the problem here??