The DataFileSystem.DeleteDataFile function was introduced in Oxide in the March force wipe (3 months ago). The latest version of the plugin utilizes that function to delete and rename profile data files when a user runs the maprofile deleteΒ or maprofile rename commands. I also plan to utilize this function in other plugins such as Backpacks. Carbon will need to add a similar function with the same name to be compatible with Oxide.
For now, you can either revert to the previous version of the plugin (v0.13.1, which will still work after the June force wipe) if you don't need any of the latest feature updates (mostly related to spawn groups and puzzles), or you can just delete any line of code that calls that function; you'll just have to manually delete profile data files if you are doing any delete/rename function via the plugin.