You probably messed up your code, or alternatively, the runtime has been upgraded, and it stopped working.

DLT is 100% declarative and never runs in any kind of sequence; instead, it is figuring out dependencies between tables and setting the execution DAG (putting code in separate notebooks is just a way of keeping your code clean).

Maybe you can attach your notebook and a screenshot of the error in the DLT pipeline.

There is also another thing you can try:

1. Create a new DLT pipeline.
2. Target a new schema.
3. Put your final bronze notebook.
4. Run.

If it runs okay, there is a chance that DLT bugged out.