This error means that Sega does not recognise the machine that you logged in from (different IP, or something else). Check your e-mail, you should have a mail from pso2 admin something with an 8-letter code. Copy paste and you can enter the game.
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Oh, I know that, I just don't understand why it's happening. It was my understanding that it happens if you're changing computer (playing from a netcafe or from a friend's place or whatever).
But I didn't really change anything. No new card or anything. So... I really don't get it.
Is pso2es still exclusive to japan only?
Officially yes and Google Play will not allow downloads outside of Japan, however you can play from any region without problem. Visit PSO2es Tweaker's website for more info.
So I got a lot of these old stones from elder, magatsu, extreme quest etc... should i dump them?
extreme is no longer exist you can turn it to somthing photon at photon shop i think
elder may be still use to exchange to invade ot cann't remember better check it out at Zeig shop
magatsu don't know about it
Most (all?) of the stuff from Extreme Quests can be exchanged for 1 Photon Booster a piece (including catalysts). The same is true for AQ stones: small and large AQ stones trade for one Photon Booster a piece.
If there are stones that don't recycle (like Magatsu stones and Elder pyroxenes), you could dump them into Material Storage and then forget about them.
server down ?