change web browsers, or use another computer to access the web console. and a reboot can do the trick sometimes. you may also disconnect your modem from the router first, simply the network.

It's C9, not C1900? you may need to upgrade to a transition firmware then to the latest firmware. that's the case sometimes as I know. or sometimes if you upload the wrong format file, it will give...

latest firmware is 170630? what's the previous firmware version? and can you save parental control and Qos?

try update the firmware on kasa

schedule programming reside in the switch, not on the cloud. it'll take effect even without internet connection

schedule reside in the switch, not in the cloud. it will not be affected by internet interruption