Some players may receive a payment processing error despite not making any purchases in the game. This message appears mainly on Huawei devices and has nothing to do with the payment. Note that the game cannot charge a player without his permission.
The issue is a known one and we are trying to fix it. In the meantime, please:
1. Skip this message by tapping the OK button without restarting the game
2. Consider using another device or install Raid on your PC
Download the Plarium Play app to play on your PC here.