We are having a problem with the new Avalara DLL. In the process of upgrading a site, we got the following error in the backend in the tax provider and on the frontend when trying to checkout: Exception of type 'Avalara.AvaTax.RestClient.AvaTaxError' was thrown. When we downgraded to the older DLL, Avalara seems to work properly.
I have attached Mario's comparison of the files.
I have also attached the Avalara log after setting the tax provider to debug. Please note the part about the missing ZIP code.
Any idea what might be going on here?