clojure ubergraph compiling error - 'namespace 'ubergraph.core' not found

Question

I have been using ubergraph last few weeks up until this morning, but now am having compiling problem.

In my project.clj's dependencies, ubergraph is declared:

(defproject graph-alg "0.1.0-SNAPSHOT"
:dependencies [[org.clojure/clojure "1.10.0"]
               [ubergraph "0.8.2"]]

In my core.clj, I have

(ns gaph-alg.core (:require [ubergraph.core :as uber]))

Even with these settings, when compiling in emacs, I kept having this error message:

*Error compiling c:/.Clojure/snippets/graphworks/graph-alg/src/graph_alg/core.clj at (1:1) #:clojure.error{:phase :compile-syntax-check, :line 1, :column 1, :source "c:/.Clojure/snippets/graphworks/graph-alg/src/graph_alg/core.clj"}

1. Caused by java.lang.Exception namespace 'ubergraph.core' not found*

I recreated new projects using lein few times with above setting, but still have same issue like above.

I am not sure whether this comes from emacs cider-repl or something else.

Does anybody else know how to handle this problem? Thanks in advance.