I bought 65ef9500 LG tv in September 2015 and set up TV apps fine at the time. I was only using Netflix and Amazon apps. Apps worked fine until a few days ago. Recently my wife opened a hulu account so on 12/30/2015 I tried to use hulu app on the LG tv. I tried to open hulu app on LG tv and the tv told me that the hulu app needs to be updated. I clicked update, got a screen with the following message:
"https://us.lgrecommends.lgappstv.com/discovery_2015/commonLang.jsp?language=en_USfile not found ."
I tried to figure out what's wrong, web browser was working fine but update did not work and I noticed that I could not connect to lg content store. Later the error message changed to "Network error(2)" and once I saw "network error(1)."
I called LG and spent an hour and a half on the phone troubleshooting: changing counties and changing network settings, 8.8.8.8 DNS server and stuff like that. Nothing helped, same error. Then the representative told me to "reset to initial settings." This did not help either but now even Netflix and Amazon apps stopped working.
So here is a tip based on my experience:
If you call LG about lg content store "network error (2)" and LG rep tells you to reset to initial settings, do realize that after you reset, even the apps that work will stop working. (Meaning: tell them no unless none of your apps are working already).
Now that I googled this topic, I see that even in 2014 LG tv owners had same issues with LG content store and same error "network error (2)." For some users these errors stay all the time and for some they seem to come and go on their own over time. This means that LG did not do much about this problem for over a year. Eventually LG representative told me that we tried everything we could over the phone and something is wrong with my TV (not LG content store) and a local third party company will contact me to set up an appointment and make repairs.
A local repair company ("Precision" -something) called and said they are really booked and the earliest they can come is January 13th and they will probably replace the main board and wifi module or something like that. So now (since 12/30/2015) I am waiting for January 13th. Not sure what to tell you. It is 2016 out there, I cannot believe that LG (or any company of that size) would be so careless with their quality control. I want things to just work. I do not want to spend time on the phone or make appointments for fixing my TV. This was my only LG purchase in many years. I will try not to buy anything made by LG in the future until their quality clearly improves.
Currently, as a workaround, I use other devices to stream content for the TV over hdmi cables. So the TV is now just a display for HDMI inputs - all "smart" apps are in paralyses.
I will post an update after Jan 13th, 2016 about how repairs helped (or not) my tv connect to the lg content store.