How to resolve 'Value cannot be null' error when using Azure Functions Core Tools?

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Had the same error message. My access was blocked via the azure firewall (vnet, subnets) and therefore, the local debugging was blocked (my IP was not added to the related storage accounts). After I added my IP to allowed list everything worked.

Also had the same problem, and it seems like in my case the reason was low and unstable internet connectivity, I was trying to work from a hotel with bad internet connection. The reason I think so is that when I came back home and tried to reproduce the error, everything started working without any code updates.

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