How can I make a field required during a workflow transition?

Question

How can I make a field required during a workflow transition? I've seen this is pretty straightforward on Cloud but we are on Jira server currently.  I am open to purchasing an app to accomplish this.  I installed a trial of scriptrunner as this seemed to be a way to solve a couple of problems I'm working on but I am either doing something wrong or Scriptrunner alone doesn't allow for this implementation.  Within the Scriptrunner documentation, I see reference to Jira Suite Utilities.  I installed the free trial for that as well.  I still don't see the "Field Required Validator" in the Validators property of a transition as referenced in the answers provided on similar questions.  I'm not sure if something has changed since those previous answers as they are a couple of years old.  Thanks for any suggestions.

Jack Brickey · Accepted Answer

JSU, JWME and TBH I thought Scriptrunner would do this as well. Cloud has JSU built in and I use that all of the time.

Regarding JSU....

When you edit the workflow and click on the transition of interest you should see Validator along w/ Conditions, Post functions, etc. Open up Validator and add validator. You should see Field Requried as an option. In fact I was just on another thread earlier today where a server person was having an issue w/ this very validator so it certainly should be there is properly installed.