Amazon Redshift Connector - Error message

[LaurentACQ]

We connected a data source through Amazon Redshift Connector (by Google) on Looker Studio. However not all the charts would load and we have different types of error on the same page:

Unable to connect to Host: An I/O error occurred while sending to the backend.

Failed to execute connection with error: ERROR: Query cancelled on user's request

Failed to execute connection with error: Exception retrieving query results.

Would anyone know where it could come from?