<Style> Tag In Page

Hello, I am unable to add tag on the page, however, previously it worked fine. I received:

NoticeSome HTML tags that you have used were cut off because of the restrictions on inserting HTML tags such as ,

I have tried edit option 'sanitize_user_html' => 'auto', to false, but it doesn't work.

Have you cleared system cache after the "sanitize_user_html" was changed?