Hi @CaptClaude
it looks like that node is still using a way of accessing the Node-RED runtime that has been long deprecated and should have been updated years ago.
The 0.20 release of Node-RED changed the internal layout of the code, so the assumptions that node made about how to access the core of the runtime no longer hold true.
I see you've already raised an issue on the node - that's the right first place to start in resolving this.