When i configure Jira sites in Jira Steps global configuration i choose login type credentials.

Then I select a System credentials and click on Test Connection it's success.

Then i try to create a pipeline job only with this line : 

jiraGetServerInfo site: 'my-jira-site'

I have the following result in my build : 

ERROR: Current credentials does not exists

If I change the system credentials into a global credentials it works as expected.

For security reason i don't want that users of my jenkins instances can use the Jira account credentials with a withCredentials call.