How to restart volumio webserver without reboot raspi?

Hi, I am enjoying music with volumio with my raspbery pi 3

But, there are some cases where I need to restart web server (i.e. it hangs)

I don’t want to reboot the raspi 3 because I have to restart all other applications again!!!

How can I restart the web server of Volumio alone?

thanks

‘sudo volumio restart’ or ‘sudo systemctl restart volumio.service’

killall node