Bare wine installation and playonlinux. Wine version under playonlinux showed "system"
Installed FLstudio 20.X and tried to register the software online, but could not. Later I forced my the FLstudio virtual drive under playonlinux to run Wine 5.11.
After that FLstudio could access internet and register sucessfully.
My suggestion: whatever changes are needed to permit a program , under wine + playonlinux, to access internet, let it work right after bare installs of wine and playonlinux. It is just user unfriendly to have to do something extra, that is not obvious and logical, to permit a prog to access internet.