I don't know that I have anymore detail on the error message than I put in the initial post. This seems to be a well-documented issue between the dbt slack channel and the github issue from dbt-spark I linked in the initial post and I think our experience pretty well matches other reports. I think you're right that the issue is something else in the configuration we haven't been able to figure out yet. I do have an update, though. We were able to add the parameter using the UI and so far we haven't gotten the error since we made that change so it seems to be something with the terraform implementation of the configuration change. We have a meeting with our databricks contact soon so I'll update this with a solution if we figure it out. Thanks for your help on this!