After performing actions which causes the SID to change (such as sysprep or a DC promote/demote), when opening an existing task in the task scheduler, you may encounter the following error:
As a result, it is also not possible to view or change the account information for the selected task.
To work around the issue, remove a saved RSA key, which has been invalidated with the change:
Upon removing the invalidated RSA keys, a new key will be created. Although you will now be able to edit the tasks again, you will probably have to re-enter the password for each of the tasks before they will properly run.