Unnable to refresh any Gradle project

Environment: IDEA CE 2017.2 on Mac OS 10.10.5

Everytime I try to refresh any Gradle project, it reports failure:

Messages Gradle Sync

Gradle 'bms' project refresh failed
Error:The specified project directory '/Users/dhu/IdeaProjects/bms' does not exist.

(bms was a standalone web project I deleted last year, I don't know why it affects other projects.)

The problem lasted for almost 1 year across several IDEA versions.

I tried deleting .idea project files and re-import the project. I also tried upgrading IDEA, upgrading Gradle or deleting IDEA preferences under ~/Library/Preferences.

None works.

I have to write a post for help. Thanks!