Hi!
I am working on an OpenRefine tutorial for some Biodiversity Heritage Library things and bumped into an error in a new installation. You may follow the step by step on:
https://docs.google.com/document/d/18jVwiOsqxFoMAHJnJ864iTBcQx39ZliLefmQh26uZpg/edit?tab=t.0
But basically I got this error:

Because I had the extension but I had not enabled the Commons standard reconciliation service, i.e. https://commonsreconcile.toolforge.org/en/api
, After I enabled it, it all worked fine.
It could be maybe fixed by (1) auto-adding the service when the extension is activated or (2) adding some more descriptive error handling.
Let me know if I can help in any way,
Cheers!
Tiago