Get contacts of a campaign using getRelatedRecords method does not work anymore

Get contacts of a campaign using getRelatedRecords method does not work anymore

Hi,

I use the following method to get list of contacts from a campaign but it does not work anymore since a few days ago (no changes on my code):

https://crm.zoho.com/crm/private/xml/Contacts/getRelatedRecords?newFormat=1&fromIndex=1&toIndex=200&sortColumnString=lastModifiedTime&authtoken=<token>&scope=crmapi&parentModule=Campaigns&id=75962000001361001

It now returns the following XML:

<response uri="/crm/private/xml/Contacts/getRelatedRecords">
<result>
<Contacts>null</Contacts>
</result>
</response>

Could you please check if there is any changes recently on your end that cause this problem.
Please let me know if you need API Token to test.

Thank you.
Nugroho