The eCSStractor for VSCode plugin does not inject classes into sass. What is the reason?

Question

css

Hello! Who faced such a problem, please tell me what is the reason: the eCSStractor for VSCode plugin does not insert classes from html into sass. I select the code in html, pkm -- eCSStractor Run, a notification appears at the bottom right that copying has been done, I switch to sass, but the classes are not inserted. Google says that for some it works correctly, for some it doesn't. Or suggest a decent alternative.