Time zone picker in System Settings does not show time zones , picker is blank.Issue The below KB describes one of the reason why the time zone picker shows empty. In the console error we can see 400 bad requestReleaseQuebec.CauseMissing sys_choice record. https://instance-name.service-now.com/nav_to.do?uri=sys_choice.do?sys_id=ca3ea1640a0170330062b9d3cf3ffa71 ResolutionAdd the missing choice record as shown in the screenshot above from any working instance.