SSIS OData cannot acquire a managed connection from the run time connection manager

The problem with SSIS is unknown. It is probably best to resort to the SSIS-support channel.

Good news is that the browser download of table names works.

Please note that https://bridge-online.invantive.com/teamleader-focus-bridge-license/odata4/Teamleader.V2Flat.DealsAll@tlr can run for a very long time since it is a table function which can triggers thousands of API calls and last hours.

Please consider the use of V2.Deals@tlr whenever possible for upto 100x better performance as described in Huge performance improvement Teamleader Focus custom fields for Contacts, Companies and Deals.

Or add $top=10 to only retrieve the first 10 rows. That should complete within 10 seconds.