a synthesized voice

If you are using PC-NVR for storage, the error usually implies the software cannot locate or write to the specified storage path. Open iVMS-4200. Step 2: Go to Tools -> Storage Server . Step 3: Ensure the Storage Server is running .

If the error occurs specifically while searching for events:

Elias pointed to the screen. "This camera thinks the Admin user is currently logged in. But they aren't logged in from here. The SDK is throwing Error 23 because it can't grant a second login session for a user that is, technically, already active."