Hi @nicks 
If you’re looking for the logs of a specific job, you can download the relevant logs from the job in the workflow overview, e.g. as seen here for some jobs from a deployment:
There, you can also directly view jobs in the browser, without the need to download the workflow (Job Viewer feature, notes for admins to enable the Job Viewer).
To analyze issues with KNIME Business Hub in general, you can create a support bundle via the KOTS admin console. This bundle is stored locally on your hub, though you have the option to download the logs, or if desired, share them directly with KNIME for an analysis (assuming your hub has access to the internet).
Kind regards
Marvin