Screensaver config flag not working win11

Hi I know this has been 4 years and maybe this project is dead but love the dvd bounce and was wanting to bring it back as my screensaver but with a different logo.
Logo change was easy but the screensaver flag in the config isn't working and if i powershell and add --screensaver it flashes up and immediately closes. Is there anything I am doing wrong?
Thanks in advance

David