NoMethodError: undefined method `project' for nil:NilClass

https://sentry.gitlab.net/gitlab/gitlabcom/issues/1628740/?referrer=gitlab_plugin

NoMethodError: undefined method `project' for nil:NilClass
  gitlab/ci/build/prerequisite/kubernetes_namespace.rb:38:in `block in kubernetes_namespace'
    project: environment.project,
  gitlab/utils/strong_memoize.rb:30:in `strong_memoize'
    instance_variable_set(ivar(name), yield)
  gitlab/ci/build/prerequisite/kubernetes_namespace.rb:35:in `kubernetes_namespace'
    strong_memoize(:kubernetes_namespace) do
  gitlab/ci/build/prerequisite/kubernetes_namespace.rb:23:in `missing_namespace?'
    kubernetes_namespace.nil? || kubernetes_namespace.service_account_token.blank?
  gitlab/ci/build/prerequisite/kubernetes_namespace.rb:11:in `unmet?'
    missing_namespace?
...
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NoMethodError: undefined method `project' for nil:NilClass