ERROR : system is exactly singular

We don't really have enough info to help you out, the link you have posted is for a location in your local system so we don't have access to it. Could you ask this with a minimal REPRoducible EXample (reprex)? A reprex makes it much easier for others to understand your issue and figure out how to help.

If you've never heard of a reprex before, you might want to start by reading this FAQ: