Node id, type or position absent

A node in the workflow has no id, no type or no position. Every node needs all three: the id to connect it, the type to say what it does, and the position to draw it. The canvas always sets them, so this arises when an agent or tool writes the workflow or when a workflow is imported from a file.

What to do

Give the node what the message names, or remove the node.

Where it comes from

Checked before every run, for any node. It is one of the messages checks before a run.