Help me please.
I open Lost Ark, the screen appears in AntiCheat, then the game loading. When the game actually opens it gives this error.
I’ve already tried verifying the integrity of the files and even reinstalled the game.
I got the same error. Been trying to play since launch hour. Redownload the game twice. Verified the files. Even change the download server from steam, but no success…
Hope support can resolve the issue soon.
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Had the same issue, cleared all my browser cache in addition to steam cache files, restarted everything then verified game files - worked for me
Have you tried to repair Easy Anti-Cheat?
yeah
thanks but not worked for me
I am having the exact same problem. I have reinstalled and verified all files with no issues. The game will still not launch.
Hello @skillado Welcome to the Forums!
Hope everyone is doing well, I am sorry to hear about that error, I see you have already tried a couple of troubleshooting steps, what I could recommend right now is these steps:
- Check updates for your drivers and also check the systems is up to date
- Make sure the Firewall is not blocking either the EasyAntiCheat or Lost Ark itself
- If you have any Overlays you can try to disable them
- Try to close any background programs
- Disable the VPN if you’re using one
Hope this helps, let me know if the issue continues! 
Not working, I tried many things but the issue is the same.
Always when the archiev lostarkweb.64 start, the game do not launch.
Still having the same issue.
Redownloaded the game.
Checked drivers (all up to date)
Verified integrity
Restarted numerous times
Cleared browser and steam data
No firewall issues
No overlays , VPN or other background apps
Ran the anticheat repair tool
I am at a loss on finding a solution to this issue.
At this point i’ve tried :
- Verifiying integrity
- Redownloading the game files (twice, with changed source server),
- Disabling all overlays
- Disabling firewall
- Disabling Antivirus
- Clearing steam cache and browser cache
- Repairing anticheat tool
- Editing config file and changing fullscreen to 1 and borderless to 0
- No VPN running
Still no success running the game 
I managed to get into the game by killing ALL non essential background running processes (even discord).
But ALT+tabbing makes the game crash
Edit : I confirm that the game loosing focus (or playing windowed) makes it crash.
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Changed it to fullscreen in the launch options and it is now working, THANK YOU!
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Glad it helped 
Just got it to work thank you for your recommendation.
I changed the config file and it is working.
(same issue of ALT+tabbing)
i didnt find a solution yet, would be glad to see some official fix.
very frustrated right now
what i did so far:
update all drivers
reinstalled the game 3 times, using 3 different harddisk locations
quitting all other applications
quitting all unnecessary background processes
-fullscreen launch option in steam
verified game data
overlays off
thinking of asking for my cash back if there is no fix to this issue, even though i was super hyped about the game…
greetings
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I played yesterday for 5 hours, got to level 24 entered a dungeon and got this same error.
I tried verifying files and reinstalling the game and now I get it on game Launch… What is this ?
I got the same issue! Very angry, I have tried all method I can found here.
Please fix the bug!
Turning off the Steam Overlay seems to have fixed the issue for me, we’ll see it it lasts.
use this link, just look at images and change the config to fullscreen 1 / borderless 0
it will make you ablew to play but you cant tab out of game which will then trigget another crash
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