I've tried run your code on my sandbox environment and I didn't encounter any issues.

I did following steps:

- (1) In my workspace under my username directory I've created ML folder:

- (2) Next, I went to my target folder (in this case I've create ML directory) and clicked create MfFLow experiment

- (3) Now, I typed in my expirement name. If you leave artificat location, by default databricks will use following one dbfs:/databricks/mlflow-tracking/<experiment-id>

- (4) Now, I created a new notebook and run the code:

Could you check if you did the same kind of steps?