"Add variable" button disappeared from Instance Variable settings
Summary
Potentially related to #299879 (closed)
If you try to add an instance variable, the button is missing:
Verified in the GDK.
Steps to reproduce
Admin Area > Settings > CI/CD, expand Variables, and note the lack of any way to add the variable.
I added a variable manually at the console with pry(main)> Ci::GroupVariable.create(key: 'TEST_VAR_GROUP', value: "asdfasdF")
(a tip from Marius), and that worked fine. Under the hood, instance variables can be created, and I can access them in a job (just tested this), it seems to be just the frontend missing the button.