Do not attempt to jump from a very old firmware version (e.g., V4.x) directly to the newest release (e.g., V5.7). Check the release notes on the portal; you may need to install intermediate "bridge" firmware versions first.
Do not attempt to jump from a very old firmware version (e.g., V4.x) directly to the newest release (e.g., V5.7). Check the release notes on the portal; you may need to install intermediate "bridge" firmware versions first.