The client has a dashboard extender rule that saves a file into the FileShare and other bits of the code that get the file from the FileShare and extract some info from it. The dashboard extender rule is run by Administrators.
The client is looking into limiting the access rights of some of its Admin users, removing access to the system tab in OneStream for them. However, while testing their reduced access, these mini-Admin users are getting an error when running the dashboard extender rule. Looking at the error message, it seems the error is coming from the function that performs operations with the files in FileShare. I think getting them access to the FileShare would solve the issue.