With SL 2018 CUs, there is a BatchApproval flow package that's supposed to be able to e-mail AP voucher approvers and allow them to approve/reject in e-mail. However, I am having troubles getting it to work. Specifically, I get an error "Action 'Approver is User' failed" when the flow is run. My guess is that I probably missed a step when importing and configuring that flow.
Is there any documentation on how to set up this flow to work with SL? Or any documentation at all on how to set up any flow with SL? I looked but was unsuccessful in locating docs.