No. But this error will most likely cause your SearXNG instance to be unstable, as a Redis failure in SearXNG means it is running in a non-SystemD system and that its anti-bot filtering daemon is not running.
uninstall SearXNG by running the command sudo /home/$USER/searxng/utils/searxng.sh remove allto fix the problem and ensure that you are using SystemD by running sudo systemctl --version.