== Background
- There are instances where our appearance settings will not apply to the interface a reader is viewing at that time.
== User story
- As a reader, I want system feedback when appearance settings do not match my expectations of the interface.
== Requirements
@ovasileva can you help me out with the reqs here?
- Exception handling copy is the same across Vector and Minerva
- In Vector, the exception text appears in the Appearance settings menu on page load and remains there until the user navigates away from the exception page.
== Design
{F43552917}
== Acceptance criteria
- Add acceptance criteria
== Communication criteria - does this need an announcement or discussion?
- Add communication criteria
== QA steps
- Visit https://en.wikipedia.beta.wmflabs.org/w/index.php?title=Banana&vectornightmode=1
- Expected: the night mode feature should be present but unusable. There should be a message explaining night theme is not available.
== QA Results - Beta
| **AC** | **Status** | **Details** |
| ----- | ----- | ----- |
| 1 | ✅ | T361158#9724696 |