https://registration.powerschool.com/family/gosnap.aspx?action=39676&culture=en
It display error -
check and resolve . so I able to do registartion process.
Did you get any technical support for error 502 Bad Gateway? Parent with same error message.
PowerSchool customer support teams are working diligently to restore full service to outages for PowerSchool customers due to the CrowdStrike update for Windows on the Enrollment Express platform.