Updated a DS-7716NI-I4-16P to v3.4.80 last week and had the same issue with blank configuration options. Clearing my browser cache has resolved similar issues in the past, but not this time.So that just leaves the weird issue of Network settings in the GUI all blanked out....
Resolved it by factory defaulting the NVR - do be wary of resetting if you have a non-WR model of course. Hikvision recommend doing so after a firmware update anyway, but a bit of a pain.
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