Wine fails to be added to the PATH, I believe. PlayOnLinux and Q4Wine both fail to be find the wine binary as seen below, and bash doesn't find it, either. I checked that I have the package 'wine' installed, as well as /usr/bin/ for the physical binaries, and they're all there and can be executed regularly. I've uninstalled and reinstalled Wine to make sure it wasn't an error on my end. Probably just an issue with the install script?
On stable, Solus 1.2.1 and completely up to date.