@Marvin Ginns​ :

The "Unable to upload to DBFS Query" error typically occurs when the Databricks Query Editor is unable to upload the query results to the Databricks File System (DBFS). This can happen for various reasons, such as network connectivity issues, insufficient DBFS storage, or authentication errors.

Here are some troubleshooting steps that you can try:

1. Check your network connectivity: Make sure that you have a stable internet connection and that you are able to access other websites or services without issues.
2. Check your DBFS storage: Verify that you have enough DBFS storage to store the query results. You can check your current DBFS storage usage by running the following command in a notebook cell:

%fs df

3. If you are running low on storage, you can try deleting some unnecessary files or increasing your DBFS storage limit.

4 .Verify your credentials: Make sure that you have the necessary permissions to access the SQL warehouse endpoint and the DBFS. If you are using a service principal to authenticate, verify that the principal has the required permissions to access the endpoint and the DBFS.

5. Check your query: Verify that your query is syntactically correct and that it is not returning an excessive amount of data. Large query results may take a long time to upload to the DBFS and can cause the "Unable to upload to DBFS Query" error.