When Riva Cloud or Riva On-Premise syncs Salesforce, the following error may appear in the sync logs:
[Task] Poll Error - INVALID_TYPE: sObject type 'TaskRelation' is not supported.
A task has multiple contacts, but in Salesforce, Shared Activities have not been enabled.
In Salesforce, enable the Shared Activities feature.
Article ID: 1558
Last updated: 23 Mar, 2017
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Riva On-Premise - CRM Sync -> Manage Riva On-Premise (Admin Guides) -> CRM Systems -> Salesforce -> Errors & Troubleshooting