I don't know anything about that dashboard, but you are using a fairly old version of node-red and a too-new version of nodejs. Nodejs should be 8, 10 or 12 (the LTS versions). Many nodes will not be compatible with v 13 I imagine.
The easiest way to get a consistent set of tools is to remove nodejs then run the recommended install script (it is promoted as for the Pi but works well with other Debian based systems, including Ubuntu).
When posting a flow please see How to share code or flow json for how to do it, otherwise your flow will not be importable.
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