When your IP or Device is banned an account connected to your account on the same network or on the same device was suspended. In this case, unfortunately, you will have to wait for the sanction to expire.
Please note that once an account is suspended, it may automatically ban all the devices that were recently used to log in into the account. The reason you see this message is because a suspended account or an account affiliated with it have logged in from your device or network. This is to prevent suspended players to create a new account and to continue breaking the game rules. Please be careful of who you share your device with.