Github Token is not saved.

[JUHYUNCHOI]

Environment:
No github token is saved. That is, input box of github is empty.

I tried to save a github token. However, it's not working corretly.
--->
. Alert 'Error Error: Failed to write file' is popped up.
. Error log below -
POST https://fs.dev.wsdk.io/webida/api/fs/file/NJPjjt5Mbl/.userinfo/github.json 500 (Internal Server Error)SettingsManager.js:110 writeFile error: Error: Failed to write file.