I had a similar issue and I found a work around for this. Please follow the below steps to get it sorted:
1. From the Data Connection select the last option which is Other Databases(ODBC)
2. Click on Driver radio button and select PostgreSQL Unicode(x64)
3. Click on Connect and enter the credentials.
4. Go to Worksheet.
You should be able to refresh extracts now.
Let me know if that helps.