Concourse 6.1.0 worker fails with private key not provided

[hemna]

I just updated to 6.1.0 from 6.0.0 and now my worker container complains about a private key not provided.

{"timestamp":"2020-05-22T15:42:32.973358021Z","level":"error","source":"worker","message":"worker.volume-sweeper.tick.failed-to-dial","data":{"error":"private key not provided","session":"7.4"}}

{"timestamp":"2020-05-22T15:42:32.973409963Z","level":"error","source":"worker","message":"worker.volume-sweeper.tick.failed-to-get-volumes-to-destroy","data":{"error":"private key not provided","session":"7.4"}}

{"timestamp":"2020-05-22T15:42:32.973369746Z","level":"error","source":"worker","message":"worker.container-sweeper.tick.failed-to-dial","data":{"error":"private key not provided","session":"6.4"}}

{"timestamp":"2020-05-22T15:42:32.973481887Z","level":"error","source":"worker","message":"worker.container-sweeper.tick.failed-to-get-containers-to-destroy","data":{"error":"private key not provided","session":"6.4"}}

When I try and run a pipeline then I get another error about a base resource not found.

base resource type not found: git

[hemna]

found the problem with my docker-compose.yml