The touch bar on Macbook was first introduced in 2016. But due to the increasing flaws in this feature, it started disappearing from Macbook gradually. There are many Macbook users who are saying that their Macbook touchbar not working, so to fix this issue you can follow these methods below:-

1. Restart your Macbook

2. Update your MacOS

3. Force quit troublesome applications

4. Refresh the control strip 

5. Refresh the touch bar