Installation problem of Civilconnection 2021 5.0.5

Does anyone know why I download civilconnection 2021 5.05 version from the github web site and install in the revit dynamo, but it doesn’t work and the reason is pkg.json contain a package without a header. Is that mean the content of pkg.json file should be the same as detail of Autodesk2021.dll??

Have you tried unblocking the dll file?

Sure, dll file unblocked