In notebook 4, right at the bottom, the model metrics and important features are being saved to the ADLS:
important_features.write.format("delta").mode("overwrite").option("overwriteSchema", "true").save(f"abfss://{file_system_name}" + "@"+ f"{data_lake_account_name}.dfs.core.windows.net/important_features/important_features")
model_metrics.write.format("delta").mode("overwrite").option("overwriteSchema", "true").save(f"abfss://{file_system_name}" + "@"+ f"{data_lake_account_name}.dfs.core.windows.net/model_metrics/model_metrics")
However in the PBI report, the datasource is looking to the /source/reporting/important_features and /source/reporting/model_metrics folders.
So when changing the datasource to point to our ADLS, the report still doesn't work unless we either point the datasource to the folders indicated by the code, or the notebook code is updated to write the files out to the reporting subfolder...