You'll have to use the FileStore.
https://docs.databricks.com/user-guide/advanced/filestore.html
Your mistake is that you didn't put it at this proper location. You put it in a different directory. You have to put it /FileStore/
Hey McKay, there could be bad import data. Databricks would not have changed anything about this job, is it possible someone changed the settings or that there was a spot price spike during the last run?