@sanyi_cfr, try @Aerox’s solution above your post. If re-installing Adobe Flash Player for IE does not work, we can go from there.
hi i did all the things mention above and i couldnt fix my problem.
when i press the start buttom i my launcher closes and Client_tos.exe stays in the task manager and i have to kill it if i want to start another tree of savior launcher.
a few times the screen have become white and a after a sec the game closes and the process stays there. i dont believe its my GPU since it’s a r9 280 amd and i have a friend that has a lesser gpu and he has the game running.
sorry for my bad english i hope you can help me. im out of ideas
caralho viado, to com o mesmo problema, eu tenho o Win 7 vou formatar e por o Win 8, se deus quiser vai dar certo!
someone help me pls
i’ve tried all the solutions but still the problem occured. re-install and repatch multiple times but this problem is still unsolved
antivirus = off
firewall = off
antivirus execution list = added
verify game cache = done (41 files and steam downloaded 4.8G data)
im using win7
try changing your dns settings to 8.8.8.8 and 8.8.4.4
make sure u don’t use any proxy
try to completely stop your antivirus
and disable windows firewall
if none worked try to access amazon site maybe your ip is blocked.
Guys, if anyone has that problem and try everything, try install the setup of DirectX that comes in the game folder (C:\Program Files (x86)\Steam\steamapps\common\TreeOfSavior\release\patch\DirectX10)
Work for me 
hi! did this work? downloading the flash player on IE?
so I open the game and it doesnt even patch? Stays at 0% and it says game is ready to launch but nothing happens when I press start
i have been having this problem and can confirm this works! so happy !
In my case the bug with launcher is that it stuck in the left top corner of screen and I’m not able to move it. I’m lucky that START button is at visible part, 4k resolution (3840x2160), nvidia gtx 980.
I can’t seem to connect to the server. is it because of my Internet or something else?
My Laucher wont start. On Steam, Preparing to lauch Tree of Savior and nothing happen. Pls help!
@brunomeba, I’ve heard of this being a firewall issue. Try completely disabling your firewall and trying it (if that works, re-enable your firewall and just add an exception for ToS).
Edit: here is someone’s detailed steps for how they solved your problem (with slightly more steps than may actually be necessary):

How about this error? :C
@ejvillalobospeji, this is what your error actually says:
ETC_20150317_001454 The graphics card or hardware does not support hardware acceleration. {nl} Please check the acceleration compatibility.
https://github.com/Treeofsavior/EnglishTranslation/blob/master/ETC.tsv#L1454
Hmm… oready try run as admin ,antivirus firewall and the verifying part…
does that mean the IP is blocked/
I reinstalled steam and tree of savior and run as admin without any farewell or antivirus and the same problem happens
ETC_20120918_014643
That’s my problem right now. Care to help solve it?
what about “recv invalid packet”?

