Why can't I buy Visiore or make other in-app purchases?

Listed below are some of the factors that affect in-game purchases:
 
1. Insufficient or outdated billing information.
Make sure that all of your billing details are accurate and up to date.
2. For more payment management information, refer to the links below.
For IOS users: https://support.apple.com/en-sg/HT201266
For Android users: https://support.google.com/googleplay/answer/4646404?co=GENIE.Platform%3DAndroid&hl=en
3. Incorrect platform account.
You can only make purchases using the specific IOS/Android account that was used to download the game.
4. Unstable internet connection.
Make sure that you have a stable internet connection, as an unstable connection may cause errors during purchase.
5. Game synchronization issues.
Leaving the game idle for too long contributes to synchronization issues. Try restarting the game to address this issue.

Note: If you encounter any iTunes/GooglePlay errors during purchase, please contact your respective app store.