I was working with an Azure Function V2 (beta) and got this exception, Figure 1, when I opened the Function in the portal.
Error: Function (BlobTrigger-v2) Error: The binding type(s) 'blobTrigger' are not registered. Please ensure the type is correct and the binding extension is installed.
Figure 1, Function Error: binding extension is installed
The message triggered a recollection of when I created the trigger and remembered that a step was to install the Windows.Azure.WebJobs.Storage extension. So I started the process to create a new, in this case, a Blob trigger and was prompted first thing to install the extension, Figure 2.
Figure 2, Function Error: binding extension is installed
Once the installation completed, I stopped the creation of the new trigger and opened the one which was giving me the exception and the issue was gone.