How can I set fix verion validation from simple script validator?
cfValues['FixVersions']?.value != ''
cfValues['Fix Versions']?.value != ''
cfValues['Fix Version/s']?.value != ''
All above are displaying error message (x).

When I set as issue.FixVersions != '', it dosen't work correctly.
I want following condition.
: FixVersions is empty -> workflow transition
: FixVersions is not empty -> validate required custom field