This is literally a 5 second fix. You'll wait until hell freezes over when you see 'try again later'
It's in limbo until you do something about it. Press the 'Smart Hub' button; Go to the icons at the bottom of the screen; find 'Samsung Apps', (if 'Samsung Apps' isn't there, click on the 'Media App'... 'Samsung Apps icon will now appear) Click on Samsung Apps and BINGO.
Dozens of Apps will now appear as clocks and start to download, (just the same as App Store on your iPhone)
Every time since I upgraded by Samsung UE46F6345 to version 2113 (and since, also 2114) I get the following message when I want to start Smart Hub on my TV. It takes about 40 seconds (or more) until I can start the smart hub. Needless to say, this is extremely annoying.
Initially, I talked to Samsung online chat, who suggested I reset the smart hub. Which I did. Next, I called them back, as it didn't work (surprise surprise) and they insisted that I call their support telephone (why they could not help me, I don't know). So, I rang a toll number to explain the situation. At first they had me reset the whole TV to factory settings. This didn't work either. I explained that this looked like a new "feature" since 2113, and that my TV works fine after that stupid update has occurred. After a lot of back and forth, the support dude escalated the case to a more senior person. I get an email a few days after - get a hold of this....
(translated from Swedish) :
In connection with the 2013 tv-models being updated to the user interface and features of the 2015 models, an initialisation process needs to run when the TV boots up. This is normal for your model, and you can expect to wait up to 40 seconds before you can start the smart hub after you turn on your TV.
This is totally unacceptable to me. Unless Samsung can fix this, pretty quickly, it goes back to the shop - and I will never look back again. The sad thing is that I was a very contented user until this. Why oh why did they have to mess it up. Samsung, are you listening?
And another note. You cannot downgrade the tv, back to a prior firmware according to Samsung. So, basically I am stuck with a new user interface (which I don't particularly like, as they utilise only a fraction of the real estate of the screen, compared with the old one that actually looked half decent) - and I cannot go back. How smart is this for a "smart" tv?