Sublime3 refused TAB what to do?

Question

Sublime Text

Good day colleagues! Help
Tab failed in sublimetext reinstallation of emmet and the program itself did not lead to results.
On the eve I wiped the keyboard, maybe I clamped something? Are there any hot cases for turning these features on and off?
css works but html doesn't

Answer 1

If css TAB works, then it's not the keyboard. Regarding the on or off, it's probably necessary