The "Your IP address has changed. Please log in again" error in cPanel login usually occurs when your internet connection's IP address changes during an active session. cPanel uses IP-based session tracking for security purposes. If your IP address changes while you are logged in, cPanel interprets it as a potential security risk and automatically logs you out to protect your account.
This error can happen if you are using a dynamic IP address assigned by your Internet Service Provider (ISP) or if you are accessing cPanel through a network with a changing IP address. It is common when using mobile data connections or certain types of internet connections that dynamically assign IP addresses.
To resolve this issue, you can simply log in again using your updated IP address. If the error persists, you may need to check your internet connection stability or contact your ISP for assistance. Additionally, you could try accessing cPanel through a different network with a more stable IP address to avoid encountering this error in the future.