It looks like it is for the Realtek wifi driver and it may need a non-free driver. PureOS only comes with free drivers and you’ll need to download the driver from the Debian repos and manually install it. A bit of work but you’ll learn something about the internals of Linux.
I asked a similar question a long time back and solved it, but Purism doesn’t want people to stray from the free software philosophy. They have a good post about it somewhere.