Why is there a warning in scss?

Question

Sass

Started working with scss. Installed koala. Scss compiles normally to css, everything works. But a red box constantly pops up in the corner of the screen with an inscription, like - Invalid CSS after "}​": expected "{", was. Maybe such a warning comes out, because the code is saved immediately, and the program does not wait until I finish writing the style? How can I remove the pop-up red window?