Internal Server Error on GET https://www.zohoapis.com/crm/v2/Events

Internal Server Error on GET https://www.zohoapis.com/crm/v2/Events

When I try to get:
https://www.zohoapis.com/crm/v2/Events?page=729&per_page=1&fields=$recurrence_id,Recurring_Activity
response from API is:

  2. {
  3.     "code": "INTERNAL_ERROR",
  4.     "details": {},
  5.     "message": "Internal Server Error",
  6.     "status": "error"
  7. }
But request without Recurring_Activity field is ok. Sample:
https://www.zohoapis.com/crm/v2/Events?page=729&per_page=1&fields=Recurring_Activity

  2. {
  3.     "data": [
  4.         {
  5.             "id": "333359000009811735",
  6.             "$recurrence_id": "1341072000000"
  7.         }
  8.     ],
  9.     "info": {
  10.         "per_page": 1,
  11.         "count": 1,
  12.         "page": 729,
  13.         "more_records": true
  14.     }
  15. }
Response on request https://www.zohoapis.com/crm/v2/Events/333359000009811735 also is without Recurring_Activity field.

How to get Recurring_Activity field value from event?