issues context variable in jira expressions

[SPACE coders]

I have validator . I want to use issues context variable 

But it gives error like this

How can i use issues context variable?

[Maciej Dudziak _Forgappify_]

I don't use script runner, but in case of validators, there are slightly different context variables available. "Issues" during transition is not available, try issue.subtasks or other properties of issue. What do you want to check exactly?