Can not add environment variable in the CI/CD settings on Gitlab CE 11.9.8
Summary
Can not add environment variable in the CI/CD settings on Gitlab CE 11.9.8
Steps to reproduce
Go to CI/CD settings of a repository and try to add new environment variable
Example Project
(If possible, please create an example project here on GitLab.com that exhibits the problematic behaviour, and link to it here in the bug report)
(If you are using an older version of GitLab, this will also determine whether the bug has been fixed in a more recent version)
What is the current bug behavior?
(What actually happens)
What is the expected correct behavior?
(What you should see instead)