This has been answered here: Installed 19.3... [node-red/tail] not currently supported on Windows
That error is related to the Tail node - which is clearer to see from the node-red log output.
In 0.19 we added reporting these errors in the palette manager, as they would otherwise be invisible to a user not looking at the log.
But we need to rethink how they are presented as it isn't clear what they refer to.
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