"Sleep Aid" needs to be able to receive Power Management messages in order to decipher what your Mac is doing when the screen is turned off.
When a user account is a regular account, Apple blocks access to functionality that Sleep Aid uses to receive Power Management messages.
To unblock access to diagnostic messages, you need to make sure your user account is an Administrator account.
Now that we're aware of this limitation, we're investigating a potential way to continue receiving Power Management messages, but via other means.
If this method works, it will require re-writing a significant portion of Sleep Aid to use this new system, therefore we anticipate this to take time and only if we can get all the information that we need.