I’ve noticed that a recursive loop throws and error likely due to a table row to variable loop enclosed in it.
Loop End is not connected to matching/corresponding Recursive Loop Start node.
Though, by right click and select loop it properly selects it.
I’ve also noticed, when manually executing nodes in between a workflow, that the table row to variable loop start node requires to been manually executed first. I strongly believe it’s related to the variable connection as when data ports are connected everything works like a charm.