path: fix error message (#6860)

Closes #6819

crates/nu-command/src/path/mod.rs

@@ -89,7 +89,16 @@ fn handle_invalid_values(rest: Value, name: Span) -> Value {
 
 fn err_from_value(rest: &Value, name: Span) -> ShellError {
     match rest.span() {
-        Ok(span) => ShellError::PipelineMismatch("string, row or list".into(), name, span),
+        Ok(span) => {
+            if rest.is_nothing() {
+                ShellError::UnsupportedInput(
+                    "Input type is nothing, expected: string, row or list".into(),
+                    name,
+                )
+            } else {
+                ShellError::PipelineMismatch("string, row or list".into(), name, span)
+            }
+        }
         Err(error) => error,
     }
 }