https://bugs.winehq.org/show_bug.cgi?id=40834
--- Comment #15 from Rosanne DiMesio dimesio@earthlink.net --- (In reply to cherrytreesforever from comment #14)
PlayOnLinux uses wine to install steam though I thought.
PlayOnLinux scripts often add unnecessary overrides, use unsupported patches, and/or obsolete Wine versions. They often cause problems that do not exist in plain Wine.
If you are incapable of running the Steam installer on your own, use winetricks to install it.