Web ADI JE after converting from 12.1.3 to 12.2.6

We are in the process of upgrading from 12.1.3 to 12.2.6. We utilize web ADI to upload our journal entries. I tried loading a journal entry in our test environment. My normal process when they create a new environment is to take a production journal entry file and change the BNE ID and servlet path to point to the test environment. I changed my production journal entry to the 12.2.6 servlet path and BNE id, but I'm getting a run time error (see below). My concern is that when we upgrade our production environment, our accounting area will have to