Recently, when I was working on workflow, got the below error.
Could not find email address for recipient of type '{0}' with ID '{1}'
Issue is because, I have used Queue record in the From field in the Send email OOB workflow step, it does not have Incoming Email email address.
Added Incoming Email address in the Queue and Workflow started working and sending emails.
Hope you also have resolved this issue with this resolution.
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