I have the same problem. New Samsung blu-ray BD-J5700/ZC opera tv store will not open at all. Error code 496 "your device is not supported"
I purchased this model specically as it is wifi enabled but I cannot surf the web without a browser. Youtube Netflix etc. Work fine. Only the Opera store does not open.
Spoke to 6 different agents. Reset the machine several times and dated to the latest software version. No one can figure it out. They said to contact The Opera web site as it is not a Samsung problem.
Out of luck with Samsung's tech people. Might as well return this player as it is not working as advertised.