Local rdf file import error

Dear All:
I'm learning rdf import from Importing RDF Data - Neosemantics ,
when I use: CALL n10s.rdf.import.fetch("https://github.com/neo4j-labs/neosemantics/raw/3.5/docs/rdf/nsmntx.ttl","Turtle"); --it's OK,but I download and import "nsmntx.ttl" locally, it fails:
CALL n10s.rdf.import.fetch("file:///D:nsmntx.ttl","Turtle"); --shows "/E:nsmntx.ttl (No such file or directory)"
then I try: CALL n10s.rdf.import.fetch("file://D:nsmntx.ttl","Turtle"); --shows "Error at index 0 in: "nsmntx.ttl" "
I wonder what went wrong.
Thanks for your help!

I am also facing the same issue when trying to load a Turtle file from my file system (using Windows) in Neo4j web console. Tried all possible syntaxes and everything fails (same errors as the original poster)