[tw5] Error starting nw

Hi, I use UBUNTU 22.04 incl. all updates. I installed TiddlyDesktop-linux64-v0.0.15-prerelease.4 ans the nw executable shows rwxrwxrwx. Starting with ./nw shows me the following error message:

libva error: vaGetDriverNameByIndex() failed with unknown libva error, driver_name = (null)

Any idea what went wrong and how to fix ist ?

Many, thanks in advance for your help and support.

Regards, Bapak Ireng