You'll notice
Useful2 Signal2
Workflow event file paths must now point at a single item directly inside the store root.
What's wrong with this entry?
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What
A file path supplied with a workflow event must now name a single object directly under the store root, rather than merely start with the root path and avoid ... The error message says so.
Evidence
filestore_path must name one object directly under
Strings lifted out of the shipped bundle, so the claim above can be checked against them.