If you are unable to complete a purchase or have received an error message, please try the following troubleshooting steps:
■Troubleshooting via respective platforms:
▼Apple Support
https://support.apple.com/en-us/108095
▼Google Play Help
https://support.google.com/googleplay/answer/1050566?hl=en&sjid=11665443315200010476-AP#zippy
▼Steam Support
https://help.steampowered.com/en/faqs/view/731C-13C7-7D04-A11E
▼Official Web Store
For users of the official Web Store, please contact the Xsolla support site regarding your payments.
https://help.xsolla.com/en
■Check if your payment method is restricted:
A restricted payment method may prevent successful purchases. For further assistance regarding payment restrictions or purchase limits, please contact your payment service provider, as these may vary depending on the platform, region, and carrier.
■【Steam】An Unknown Error Appears in the Shop
Enable the Steam Overlay might resolve the issue.
※You can enable the Steam Overlay by going to [Steam Settings] > [In-Game].