Repeated 'Illegal Argument' ERROR when pushing data through to a DataHub
I've been having an issue pushing large quantities of transactional data from an externally uploaded .csv file into a data module within a DataHub model. The .csv file is generated directly from an internal operational data store that queries data by client. I can populate its referential list with no issues which is the step before in the process, but the module upload continues to fail.
Also want to note that this is a DataHub model that has never changed modes since it was created. It has always been in Standard mode. We use the 3rd party integration tool called Workiva (formerly OneCloud) to upload the file and execute the process on a schedule via a service account with Workspace Admin & Full Access permissions.
The error originally appeared after a few successful executions, and the process would be successful more often than not, however the 'Illegal Argument' Error now occurs on every attempted run of the action causing the process to fail.
I have been unable to find another person who has raised this specific issue on the community and have an active support ticket raised looking into the matter. The community ends up being very helpful, so I wanted to put the situation out to look for help.
Below is an image from the logs depicting the error from Workiva:
I can expand on any issues that may need clarification.