Failed To | Start Playback Netsdk Returns Error Smart Pss !!exclusive!!

: If you are using a non-admin account on the NVR/DVR, it might not have the rights to operate playback for specific channels. Log in to the NVR with an administrator account. Account Settings

As a last resort, the underlying NetSDK version on your NVR may be buggy. Failed To Start Playback Netsdk Returns Error Smart Pss

Before digging into complex settings, try a "hard" restart of the software. Sometimes a background process hangs. : If you are using a non-admin account