@PCH3 

To resolve the PDF issue, search at the bottom of your Windows 11 screen for "run." Then open the "Run App" that came up under your search and type "optionalfeatures" into the Run App. A "Windows Features" window then opens and scrolls down to "Microsoft XPS Document Writer" and checks the box next to it. then pressed "OK". You should be able to start creating PDF Invoices again.