I too have the same problem, which started after updating the Now Tv app on my Lg tv
OLED55b7v model. I am asked to input my username and password, when i select a program to watch. However, the virtual keyboard does not appear to allow input of information!!!
The Now Tv app version is 3.0.2 and the software version of the lg tv is 05.80.35
Can anyone help with a solution?
I don't own an LG Smart TV so i won't be much help, but what i would be inclined to try whilst waiting for an answer from a fellow LG Smart TV owner would be to put the TV in standby, then unplug the power to the TV for say a minute, then power back the TV on again and see if you can access the NowTV App and use it as normal.