Hikvision DS-7608NI-I2/8P & DS-7732NI-I4. Firmware progressively upgrades from v4.40.017 ->v4.50.000 -> v4.50.010 -> v4.51.005 -> v4.51.025. With web browser (MS Edge or Firefox), able to login in with admin credentials. The WEBGUI is updated. Downloaded/installed the newer plug-in for web browser. However, unable to live view nor playback. In playback tab, there are the pink indicators of recorded video at bottom to choose the time of video. Does the newer version of firmware not work for live view/playback? Does IVMS-4200 have to be used instead? Anyone successfully with firmware v4.51.025 and Live View/Playback using WEBGUI?