500 Internal Server Error when trying to execute automation task

Hello,

When I try to send an execute request (https://prod-vortexapi.zephyr4jiracloud.com/api/v1/automation/job/execute), I received 500 Internal Server Error message. It's the same issue, with same steps than https://community.smartbear.com/t5/Zephyr-Squad-Questions/Inconsistent-Behavior-between-JIRA-Test-Automation-UI-and-Zephyr/td-p/257617

Please, can you help me? Thanks in advance.