I found the cli approach a bit more than I wanted to handle....so I dug around and found QR Code Generator.....AND....it works with spaces
Install QR Code Generator on Linux
QR Code Generator is available as an AppImage as well as a Snap package on Linux. If you have Snap present on your machine, you can get QR Code Generator on it by running the following command in a terminal:
sudo snap install qr-code-generator-desktop
Alternatively, if you don't have Snap, you can first install it using our Snap guide or download the AppImage for QR Code Generator.
After this, go to the folder where you've downloaded it and right-click on the AppImage. Select Properties, and on the Properties window, click the Permissions tab.
Finally, check off the box next to Allow executing file as a program if you're using a Nautilus-based file manager. On Dolphin, tick the Is executable option and change the Execute dropdown to Anyone on PCManFM.
There's an even easier way to generate QR codes for web URLs. If you use any of the Chromium-based 'clones', it's now a standard option in the right-click context Menu. Has been for the last 18 months or so.