Invalid CSS after "Κ": expected "{", was "" in codesandbox

Question

I created a vue application with vuetify in codesandbox

The problem is codesandbox doesn't load sass file. I have sass-loader in package.json.

Not sure what the problem is and the message is not clear.

Error: Invalid CSS after "Κ": expected "{", was ""
        on line 1 of node_modules/vuetify/src/styles/styles.sass
        from line 1 of /stdin
>> Κ
   ^