Nothing happens when clicking the buy now button after going into the lost ark shop, a gray spinner shows and just disappears
Hello @obs619,
Welcome to Lost Ark Forums! 
This issue where you are not able to purchase Royal Crystals could be a general glitch which can be rectified using the files integrity check.
I request you to log out of game and do the files integrity check using the steps in next reply.
Hope this helps! 
STEPS TO VERIFY FILES INTEGRITY:
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Restart your computer and launch: Steam
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Next, you can either right click the game in your Library, or click the gear icon from the game’s Library page on the far right
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From the drop down menu, select Properties…
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Select the Local Files tab and click the Verify integrity of game files Button
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Steam will verify the game’s files - this process may take several minutes
Important:
One or more files may fail to verify.
This is normal for most Steam games. The files that fail to verify are local configuration files that should not be replaced as part of this process.
Warning:
Do not run the verification process while performing other system-intensive processes, such as defragmenting your hard drive or scanning for viruses.
Do not run this process for multiple games at the same time.
Thanks, i followed all of these steps and all files verified correctly but i get the same issue
Hey @obs619.
My apologies to hear you still experiencing the issue after following those steps. In this case I’ll ask you to please contact our colleagues in the Customer support:
So it will be scaled correctly by the team in charge, they will provide you a ticket and hopefully will find a solution to this ASAP.
Hope you have a wonderful rest of your day!,
Regards.