ended up working out later on in the day, sorry for the late response
So any ETA about this getting fix?
It would be nice to be able to buy things from the store y’know…
I’m just sitting with money on steam from day 1 trying to buy Royal Crystals and still nothing.
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Guys if you get Fail to Purchase message popping up, It is not a overlay issue or file issue!!! Please go through steam support and have them verify your cards and boom!! you can now buy crystals again! This will probably take 1 day!
Update: It only fixed it for few purchased and now the message is back “Fail to Purchase”. I asked steam if its a account restriction and they have responded and said it is the game issue, So, try to get your card verified with steam and see if it works for yall and if not we have to wait for the fix 
I started having same “Purchase Failed” issue after making my first purchase. I’ve tried every possible fix i find across the forums, and still no luck.
For me my first purchase went flawlessly, but then my Lost Ark had an update and I tried buying crystals and keep getting ‘Purchase Failed’… after trying all Steam and Lost Ark troubleshooting options shared above - It Works Again!
I suggest putting money in your Steam wallet to pay…
Shut down Steam from Task Manager and restart Steam in Admin mode.
Right click Lost Ark, Properties, Local Files, Verify integrity of game files.
Steam dropdown window, Settings, In-Game, check both “Enable the Steam Overlay while in Game” AND “Use Desktop Game Theater…”
Should be all good, then Play Lost Ark. Worked for me. Good luck!!
I having the same issue on 15/03 bought royal crystal pack $85.00 and success.
Today on 16/03 try to buy royal crystal pack $212.00 and Purchase Failed.
I’ve done below and still encounter Purchase Failed in game store.
Steam verification checked.
Enable Steam Overlay while in-game.
Run steam as an administrator.
Issue still on going as I check on forum, try fasten the process to fix this issue.
same problem here… i bought the pack with 2200 crystals and i can’t buy anymore. none of the solutions I found on the forum helped. very frustrating…
waiting for a fix
I’m having the same damn issue. For curiosity sake, I’ve tried other purchases and NONE of them are working either. Pretty pissed off that I allocated funds and can’t use them… FIX THIS!!!
I had this problem, ran through all the solutions and nothing worked…
What got it working for me was to open a resource light game in steam and open the steam overlay in that game.
Then I loaded lost ark, made my purchase and closed the other game down.
Might have been a fluke, ive not tried buying anything since but maybe worth a shot.
Having the same issue however it has only just started happening yesterday I have been able to buy everything up until yesterday. I have tried every fix and nothing works. Ive bought ALOT of crystals and all of a sudden I’am getting the purchase failed message. It’s so frustrating because iam at item level 1368.33 and all I need is that last little bit of gold to boost me to 1370 so I can do the new content. PLEASE PLEASE PLEASE fix this asap!!!
Please resolve the issue why can i not buy anymore for like almost a week now not everyone is a broke bum
I figured out why i was having this issue in case anyone else is a fringe case like me. my old card expired and I used my new credit card to fund my steam wallet. Steam then locks your funds until you go into your steam wallet and click a small button saying that you need to verify your card.
Now that I fixed the steam issue it’s working. This might not be everyone’s problem but it might help someone
I am having the same issue here. I have tried all trouble shooting steps, Overlay is enabled, closed steam via task manager, running steam as admin, verified game files, verified my card with steam, all the funds are available in steam. I am at loss of what to try next?
I solved my issue this way.
I know steam has Settings → In-Game → Enable/Disable Steam Overlay
But for some reason it wasn’t working. It worked before and I didn’t change anything.
On my library screen in steam.
Lost Ark → Right Click Properties → General → I just clicked both “Enable the Steam Overlay while in-game”
I went back to Lost Ark and then able to make a store purchase.
I am also experiencing the same issue. I have been trying to get it fixed through support to no avail. Could this have any relation to the update that limits untrusted steam accounts?
It lets me buy the 10 dollar RC but not the 100 dollar one. That’s the weirdest part to me
i spoke with live chat, they said they currently have no fix LMAO…and they already inform Developer, sooooo