2022-01-19 07:45 UTC We're investigating issue in Legacy Sandboxes, internal error is being thrown when user tries to create sandbox from transformation
2022-01-19 10:57 UTC We've identified the issue and prepared a fix. We will let you know as soon as the fix is deployed.
2022-01-19 15:52 UTC The fix has been deployed and Sandboxes creation works as expected. We are sorry for any inconvenience.