I just saw this message pop up this morning when
You are missing the following 32-bit libraries, and Steam may not run:
libva.so.1
libbz2.so.1.0
libva.so.1
libva-x11.so.1
Press enter to continue:
I solved it by
sudo apt-get install libva-dev:i386
And restarting Lutris 4.19
Hope this helps anyone if they run into this error too!