On base of another question (Error message from Workflow Validator not displaying on Jira Cloud Issue Create Screen), I’ve created a new validator defined only in manifest:
modules:
jira:workflowValidator:
- key: validator-expression-test-example-workflow-validator
name: validator-expression-test
description: A Jira workflow validator example.
expression: true || false
errorMessage: "Please display this..."
Even that is not doing anything…
I also tried to deploy and install the validators in the production environment, this was also not changing anything…
So either the validator implementation is not working at all, or there are some limitations, prerequisitions or settings which are not done. My site was freshly created and besides installing some apps from the tutorials I did not change anything there.