Why does SassError: Expected tabs, was spaces occur?

Question

Sass

Before that, I did all projects according to the same principle, eslint is sharpened for spaces, I never used tabs, I didn’t catch such an error ... where can I specify spaces for sass, in some config, so that when using spaces there is no error? Why does he expect tabs at all? The first time I installed Vuetify - maybe it puts something by default?