Samuel Wood (Otto) on "[Plugin: Theme Check] REQUIRED: You are not allowed to hide the admin bar. Issue"

I am trying to update my theme and keep getting this error, while I haven't done it anywhere.

The previous versions were fine.

https://wordpress.org/plugins/theme-check/

We have made the checks a bit stricter. Are changing something with admin bar?

No. I am not doing anything to hide admin bar still the error shows up.

Do you have any css code that mentions #wpadminbar?