DUB Dependency Tree Configuration Error

["Nordlöw" via Digitalmars-d-learn]

Suddenly

running dub triggers the following error

Error executing command run: Could not find a valid dependency 
tree configuration: No match for dependency dchip ~master of fdo

If I remove dchip I get the same error for all other packages.

What is wrong?

I've tried removing ~/.dub/packages with no progres.