SharePoint Online List Data Source Connection error.

I'm trying to connect to a SharePoint Online List and receive the following message:

"DataSource.Error: We couldn't parse OData response result.  Error: A null value was found for the property named 'ParticipantsPickerId', which has the expected type 'Collection(Edm.Int32)[Nullable=False]'. The expected type 'Collection(Edm.Int32)[Nullable=False]' does not allow null values.
Details:
    DataSourceKind=SharePoint"

Any ideas on what is causing the error and how to fix it?

Thanks