azure CLI `func new` gives error `Value cannot be null. (Parameter 'value')`

Question

The Azure CLI command

func new kept producing the same error:

One or more errors occurred. (Value cannot be null. (Parameter 'value'))

What causes this and how to fix it?

Answer 1

Solution was to delete "extensionBundle" block from the host.json - issue seems to be related to the extension bundle installation on windows and simple removing this reference to them fixes the problem

Update

This however has a consequence that extension bindings that you might later need during func start will not be found and hence give errors. So you might need to add extensionBundle back afterwards.

Strangely this process of deleting it for func new command and adding it back before func start works.