Caused by: com.boomi.connector.ConnectorException: Error precessing QBXML response:Session Authentication required.-- Status Code:2020--ERROR:Session Authentication required
This is caused by the QuickBooks Online Connection Ticket being configured with Login Security turned ON when it should be turned OFF.
When configuration a QuickBooks Online Connection component, and going through the QuickBooks Online Connection Ticket wizard, you must turn Login Security off by selecting the option No. Anyone who can run Boomi On Demand on this computer can use the connection. You will need to generate a new connection ticket and configure your Boomi QuickBooks Connection with it by following the steps in the QuickBooks Connection reference guide. You cannot modify the connection from within QuickBooks Online.
To remove the old connection ticket, log into QuickBooks Online and navigate to My Account > Connection List, select the previous connection, and click Delete.